what causes a dryer thermistor to fail?

Clear the vent restriction before replacing the thermostat to ensure that your dryer … – user9911 Jan 4 '13 at 19:14 You can also drop the thermal cutoff on the ground a few times to reset the inside diaphragm. Its probably reading a little low, or intermittently failing, so the dryer is getting slightly hotter than is supported and the thermal fuse blows. If it heats the thermostat is the problem. If it doesn't heat then the thermal cut-off and hi-limit can be checked the same way. If the thermistor has the correct resistance readings and clean and tight connections then the most likely cause is the heater relay sticking closed. The thermistor checks out. This fuse is put in place to help prevent fires. Step 1: Make note of the current reading on your thermistor. The label saying “Clean filter after every load" is there for a reason! References A third possible cause of overheating is worn felt seals on the front and back of the drum. If you replace the fuse without fixing the cause, the problem will recur, and it might even cause a fire. To address this issue, remove the cover from your thermostat and gently clean its interior components—including the bimetallic coil and switch contact surfaces. The dryer will run for a few weeks or months, and high limit will fail again. Find out what the 7 main causes are for a tumble dryer not heating up properly and discover some simple solutions to fix the problem. When the fuse blows, the dryer won't get hot, but when the cutoff blows, the tumbler won't spin. Any obstruction to the rate of airflow will affect the operation of the dryer and almost certainly cause a failure of the thermostat or, the safety thermostat to trip. This fuse will often burn out due to clogged dryer ducting or a defective cycling thermostat. The second most commonly experienced issue with thermistors is drifting in the resistance value. Most of the time, the electrical engineer is looking for some fault in dyer that cause the dryer to overheat: stuck thermostat, thermistor failure, moisture sensor failure, timer failure, arcing on the motor winding, wire chafing, etc. And check the airflow through the dryer and out through the exhaust to be sure there isn’t an obstruction. As a landscape builder, he helped establish two gardening companies. How to Replace the Thermistor in Your Maytag Dryer Check the exhaust path for excessive lint or debris all the way to the exit point of the exhaust pipe. If this is true, you won't feel much air coming from the vent outlet. If you find that your clothes are wrinkled after using your dryer, there are a couple … Main causes: damaged door seal, faulty defrost sensor or bi-metal thermostat, broken defrost heater, bad defrost timer or control board A dirty thermostat can cause erratic operation and sudden system failure. It could be that the thermal epoxy has attacked the exterior potting of the thermistor. Clear the vent restriction before replacing the thermostat to ensure that your dryer … To tell for sure, you have to open up the dryer, but there are some things you can do first. If you've ever pulled clothes out only to find that they were still damp, or found that your dryer was not shutting off at the timer, the thermostat may be the first thing to troubleshoot. They are basically fuses that react to excessive temperature -- not electrical current -- but they shut off electrical power when they blow. A defective cycling thermostat can also cause the dryer to overheat if it doesn't turn off the heat at the proper temperature. I also tested the high-limit thermostat at room temperature and it was closed, so I thought the logical assumption was that the thermostat was failing to open, which then caused the thermal cut-off fuse to fail. It monitors the temperature inside the housing, and when that temperature exceeds its limit, it melts, thereby opening the circuit to the motor. If it heats the thermostat is the problem. The fuse controls the dryer's heating element whereas the cutoff controls the motor. If the thermistor is damaged it may not sense the correct temperature in the dryer drum, meaning it will tell the control board to keep the heat on even though the dryer has reached or surpassed the proper drying temperature. Dryers have included thermal cutoff devices since the 1980s as a required safety measure. If it doesn't heat then the thermal cut-off and hi-limit can be checked the same way. The dryer will run for a few weeks or months, and high limit will fail again. Answer Jim, if there is not a gap in the vents or felts seals, the thermistor WP8577274 tested properly and there are no wires that are grounded out going to the element, then the failure would be in the main control WPW10111616. How to Check the Thermostat in a Whirlpool Dryer Model LER4634EQ0, How to Know if a Whirlpool Oven Sensor Is Bad, Appliance Assistance: How Electric Dryer Parts & Components Work, Lowe's: Clothes Dryer Repair Tips, DIY Help, and Information, How to Troubleshoot a Dryer's Thermal Cutoff Switch. Thermistors can be damaged or destroyed if temperatures fluctuate outside of the acceptable range. Is your tumble dryer not heating up? Find out what the 7 main causes are for a tumble dryer not heating up properly and discover some simple solutions to fix the problem. A tumble dryer that’s not heating properly is a common problem for many people and can be very frustrating. Your dryer’s thermostat regulates the air’s temperature in the appliance and when this part malfunctions your dryer may not heat up. Usually, thermistor failure is caused by an open circuit due to mechanical separation between the resistor element and lead material. Wrinkled Clothes. A blown thermal fuse may be to blame. Here's the thermistor for your model you can order if needed: The fact that there is too much heat in the housing suggests the possibility that the blower, which pushes hot air through the exhaust, is broken. Codes: nE 8E8 UO1 d01 The dryer’s thermal fuse is a non-resettable safety fuse that is designed to break electrical contact to the dryer’s burner if the dryer becomes too hot. I “think” I am entering the dryer into a diagnostic mode by depressing the more time and less time button then pressing the power button. The dryer’s thermal fuse is a non-resettable safety fuse that is designed to break electrical contact to the dryer’s burner if the dryer becomes too hot. On newer dryers, a blown thermal fuse may prevent the dryer from running at all. The location of the cutoff varies according to dryer model, but it's usually attached to the dryer housing. I also tested the high-limit thermostat at room temperature and it was closed, so I thought the logical assumption was that the thermostat was failing to open, which then caused the thermal cut-off fuse to fail. Regularly cleaning your vents to remove lint buildup is an important part of dryer maintenance. Jim for Model Number 11068087701. It could be that the thermal epoxy has attacked the exterior potting of the thermistor. It could be that the thermal compound has a different coefficient of expansion than the thermistor leading to mechanical stress on the thermistor. Replace the thermostat also, it should be right there next to the fuse. Answer Jim, if there is not a gap in the vents or felts seals, the thermistor WP8577274 tested properly and there are no wires that are grounded out going to the element, then the failure would be in the main control WPW10111616. This is the most common reason a thermal cutoff fuse keeps tripping. It's cold resitance was 24 K Ohms, heated with hair dryer, it dropped to 15K ohms. Test the thermistor for resistance as this controls temp, when multimeter is across the thermistor after it is disconnected from dryer, you should get a ohms reading then use a cigarette lighter and heat end up slightly and ohms reading should change. My dryer gets too hot. You need to remove the vent line from the back of your dryer and clean it out. Whether you want to replace the fuse yourself or call us for a repair, you should start here. The thermal fuse is the most common cause when a dryer has no heat. You could also have a heating element that is shorted to the cabinet and heating constantly. Do not let it continue to run and heat past this temperature. When a thermal cutoff blows, you have to replace it to get the dryer working again. The Tumble Dryer Filter. Both parts come as a kit. A small Direct Current (DC) is sent to the thermistor via the potentiometer, the PCB then knows whether to give … Testing a Thermistor. Main causes: damaged door seal, faulty defrost sensor or bi-metal thermostat, broken defrost heater, bad defrost timer or control board I “think” I am entering the dryer into a diagnostic mode by depressing the more time and less time button then pressing the power button. My dryer gets too hot. If the dryer heats up way past 150 degrees, then you will likely need to replace the operating thermostat that is right beside the thermal fuse. A blown thermal fuse may be to blame. If the meter indicates very low or no resistance, the element is defective, and you should replace it. Based on you details the heater is Okay and not shorted to the heater housing. The leading cause of thermal fuse burnout is obstructed airflow. Thermostats regulate the … Turn off the electrical power to your dryer. And check the airflow through the dryer and out through the exhaust to be sure there isn’t an obstruction. The Tumble Dryer Filter. Any obstruction to the rate of airflow will affect the operation of the dryer and almost certainly cause a failure of the thermostat or, the safety thermostat to trip. A defective cycling thermostat can also cause the dryer to overheat if it doesn't turn off the heat at the proper temperature. Do not let it continue to run and heat past this temperature. If this has failed the dryer will overheat and cause over temp thermostat to cutout. This can happen as a result of improper handling, thermal mismatch, or heat damage. Separation occurs because of handling damage, high/excessive heat, and thermal mismatching. It could be that the thermal compound has a different coefficient of expansion than the thermistor leading to mechanical stress on the thermistor. Believe failure was caused by lint build up on the sensor and on the air rotor vanes. I replaced this thermistor 18 months ago. To tell for sure, you have to open up the dryer, but there are some things you can do first. If this has failed the dryer will overheat and cause over temp thermostat to cutout. I replaced this thermistor 18 months ago. Hi-Limit Thermostat failed. Codes: nE 8E8 UO1 d01 Whether you want to replace the fuse yourself or call us for a repair, you should start here. The most important thing is to figure out the reason. The dryer will not operate if there is a problem with the thermal thermostat, and may run for only short cycles if there is an issue with the cycling or high-limit thermostat. Thermistor faults Thermistors work in conjunction with the user potentiometer (boiler setting for temperature), and the Printed Circuit Board (PCB). It could be that the exterior potting material on the thermistor is defective leading to moisture ingress. You need to remove the vent line from the back of your dryer and clean it out. A broken thermistor may prevent a dryer from operating at all. Both parts come as a kit. Usually, they do find anything wrong with the dryer components, or they are too damaged to test. A small Direct Current (DC) is sent to the thermistor via the potentiometer, the PCB then knows whether to give … Over time, the thermistor circuit becomes less accurate and displays incorrect temperatures. The most common failure is an open circuit. Another common issue is a failing cycling thermostat. Dryer stopped heating again, so I pulled this pricey piece of plastic and glass. The thermal cutoff isn't the same as a thermal fuse. The first and most obvious is the heating element itself. Also check the heating element to be sure it has continuity. The second most commonly experienced issue with thermistors is drifting in the resistance value. This occurs because thermistors are often used as protection devices against excessive heat. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. Repair or replace the dryer electronic control board. NOTE: Stop the dryer if it heats past 180 degrees. When I do this, I get the following codes. If the machine continues to run the thermistor is probably good. The most important thing is to figure out the reason. How to Troubleshoot a Dryer's Thermal Cutoff Switch, How to Fix a Whirlpool Dryer That Blows Cold Air, Venting Problems With a Front Loading Dryer, Troubleshooting a Dryer That Doesn't Turn On, U.S.Federal Emergency Management Agency: Clothes Dryer Fires in Residential Buildings (2008 - 2010), How to Fix a Clothes Dryer That Won't Turn On, How to Troubleshoot a Kenmore Elite Gas Dryer That Won't Heat. You could also have a heating element that is shorted to the cabinet and heating constantly. It failed the continuity test -- should it pass? Wash the lint screen with water and a nylon brush and then thoroughly dry it … Distributions for Thermistors1[1] Failure Mode Relative Probability Open 63% Parameter Change 22% Short 15% The unfortunate consequence of thermistor failures is they often cause substantial secondary damage to other circuit elements when they fail. – user9911 Jan 4 '13 at 19:14 You can also drop the thermal cutoff on the ground a few times to reset the inside diaphragm. People tell us that they clean the filters, we often see a different story. How It Works A dryer's control panel relies on the thermistor to regulate the drum's air temperature by monitoring the component's resistance changes; resistance goes down as temperature increases and up when temperature decreases. Although there are a number of reasons the dryer's drum won't tumble, the most common cause is a defective belt, particularly if the motor is running. People tell us that they clean the filters, we often see a different story. A tumble dryer that’s not heating properly is a common problem for many people and can be very frustrating. A broken thermistor may prevent a dryer from operating at all. The idea would be to bypass the thermostat, hi-limit or thermal cutoff one at a time and see if the dryer will heat. Also check the heating element to be sure it has continuity. If it isn't working, a continuity test will reveal infinite resistance. Testing a Thermistor. Would it be the thermostat wp8557403? Usually, they do find anything wrong with the dryer components, or they are too damaged to test. If the new one also blows, you need to troubleshoot the cause of the excessive heat before you install another one. When you find the air in your gas dryer not heating up, the culprit could be the timer or electronic control board that controls the heat. The electronic control board governs the timing … Fortunately, this is something that a homeowner can replace with some basic tools. Check the thermistor with an Ohm meter, if it reads >50k Ohms (E1) or less than 500 Ohms (E2) it is defective. The label saying “Clean filter after every load" is there for a reason! The thermal fuse is the most common cause when a dryer has no heat. © Copyright 2020 Hearst Communications, Inc. Thermistors are also designed to handle radically different heat capacities, which means that dryers and other appliances require a specific type of thermistor to function. Check the thermistor with an Ohm meter, if it reads >50k Ohms (E1) or less than 500 Ohms (E2) it is defective. You're especially likely to have clogged vents if your pipes are made with corrugated metal or worse, plastic. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Thermistor faults Thermistors work in conjunction with the user potentiometer (boiler setting for temperature), and the Printed Circuit Board (PCB). The dryer will not operate if there is a problem with the thermal thermostat, and may run for only short cycles if there is an issue with the cycling or high-limit thermostat. To check the accuracy of your thermistor, you will need: A thermistor; A heating device of any kind, such as a blow dryer or space heater; A multimeter with an ohmmeter; Once you have your materials, you can begin evaluating your thermistor in a few quick steps. The thermostat in your clothes dryer is an important component to the unit. Since it only responds to temperature, its failure usually doesn't signify an electrical problem. When dryer hoses or vent lines become clogged it prevents proper air circulation, which will eventually cause your dryer to overheat. This fuse will often burn out due to clogged dryer ducting or a defective cycling thermostat. They allow hot air to escape, forcing the heating element to stay on. How to Replace the Thermistor in Your Maytag Dryer If it has shorted, it may stay on even when the cycling thermostat turns it off. Another common issue is a failing cycling thermostat. A defective cycling thermostat can also cause the dryer to overheat if it doesn't turn off the heat at the proper temperature. The other is a thermal thermostat, which also cuts the connection to the heating element if the temperature reaches a certain level. Most modern dryers, however, have safety mechanisms in place that will automatically turn the unit off if the temperature goes too high. The most common failure is an open circuit. One is a high-limit thermostat that disrupts the electrical connection if the dryer gets too hot. Modern dryers usually have more than one thermostat: a cycling thermostat that turns the heating element off and on to keep the temperature even; and either a high-limit or thermal thermostat that cuts power to the heating element if the dryer overheats. The difference is that the thermal component must be replaced if it is ever tripped, helping to ensure that the cause of the overheating is fixed. Test the thermistor for resistance as this controls temp, when multimeter is across the thermistor after it is disconnected from dryer, you should get a ohms reading then use a cigarette lighter and heat end up slightly and ohms reading should change. If the heater is shorted to the housing, it will cause the dryer to overheat. Another common reason thermistors fail is simply aging. Jim for Model Number 11068087701. Would it be the thermostat wp8557403? © Copyright 2020 Hearst Communications, Inc. So there are three temperature sensors in most dryers, and the thermal fuse is the last. It’s meant to do this as a safety feature to prevent overheating but if the vent restriction is not corrected, repeated cycling of the high limit thermostat may cause it to fail such that it no longer prevents overheating. A bad heater relay, blown thermal cut-off fuse, faulty thermistor, broken operating thermostat or failed high-limit thermostat can also prevent the dryer from heating. Replace the thermostat also, it should be right there next to the fuse. In addition, the dryer may have a thermometer and temperature control or a simple thermostat. So there are three temperature sensors in most dryers, and the thermal fuse is the last. This is the most common reason a thermal cutoff fuse keeps tripping. Press the Push To Start switch. This can happen as a result of improper handling, thermal mismatch, or heat damage. These failures can arise because of mechanical separation between lead materials and resistor elements. A dirty thermostat can cause erratic operation and sudden system failure. Believe failure was caused by lint build up on the sensor and on the air rotor vanes. Most likely the fuse has blown and will need to be replaced to get your dryer up and running again. These mechanisms rely on two other types of thermostats. If the thermistor is damaged it may not sense the correct temperature in the dryer drum, meaning it will tell the control board to keep the heat on even though the dryer has reached or surpassed the proper drying temperature. Like most components on your dryer, thermistors are inclined to wear and malfunction with normal dryer use. On newer dryers, a blown thermal fuse may prevent the dryer from running at all. Is your tumble dryer not heating up? NOTE: Stop the dryer if it heats past 180 degrees. A faulty Thermostat can cause the temp to go too high. It’s meant to do this as a safety feature to prevent overheating but if the vent restriction is not corrected, repeated cycling of the high limit thermostat may cause it to fail such that it no longer prevents overheating. This occurs because thermistors are often used as protection devices against excessive heat. It failed the continuity test -- should it pass? I tested the thermal cut-off fuse and found that it was open. One of the more common causes of the clothes dryer, not heating is that the Thermal Cut-off is faulty. A faulty Thermostat can cause the temp to go too high. The timer, motor switch and … This is a dangerous situation and can lead to a fire. The first failure was about four weeks ago. The thermistor checks out. Its probably reading a little low, or intermittently failing, so the dryer is getting slightly hotter than is supported and the thermal fuse blows. Clogged or restricted exhaust vent air flow is the most frequent cause of a thermal fuse blowing. Most likely the fuse has blown and will need to be replaced to get your dryer up and running again. ➔ If you hear three short beeps and the dryer shuts off after several seconds, the thermistor or wire harness is either shorted or open. References Step 1: Make note of the current reading on your thermistor. Most of the time, the electrical engineer is looking for some fault in dyer that cause the dryer to overheat: stuck thermostat, thermistor failure, moisture sensor failure, timer failure, arcing on the motor winding, wire chafing, etc. The last of the common causes is that the Hi-Limit Thermostat is not … Over time, the thermistor circuit becomes less accurate and displays incorrect temperatures. Unplug the appliance from the wall, or cut the circuit to … Dryer stopped heating again, so I pulled this pricey piece of plastic and glass. Thermistors can be damaged or destroyed if temperatures fluctuate outside of the acceptable range. I tested the thermal cut-off fuse and found that it was open. A visual inspection may reveal that it's touching some part of the assembly casing, but if not, you should unplug the dryer, remove the heater assembly and test it for continuity with an ohmmeter. Separation occurs because of handling damage, high/excessive heat, and thermal mismatching. It's cold resitance was 24 K Ohms, heated with hair dryer, it dropped to 15K ohms. Issues That Can Affect Air Conditioning in a Home. The dryer will not operate if there is a problem with the thermal thermostat, and may run for only short cycles if there is an issue with the cycling or high-limit thermostat. What Causes Coils to Freeze on Home AC Units? The repairs should be fairly simple for someone with some DIY skills and the right tools for the job. A number of components inside the dryer can cause overheating. Another common reason thermistors fail is simply aging. Usually, thermistor failure is caused by an open circuit due to mechanical separation between the resistor element and lead material. Wash the lint screen with water and a nylon brush and then dry... With water and a master 's degree in humanities pipes are made corrugated... Does n't turn off the heat at the proper temperature, or heat damage machine to! A continuity test -- should it pass if your pipes are made with corrugated metal worse. In popular science, Deziel has a bachelor 's degree in humanities unit off the! Can replace with some DIY skills and the thermal fuse may prevent the dryer overheat. Shorted to the cabinet and heating constantly the more common Causes of the clothes,... Becomes less accurate and displays incorrect temperatures airflow through the dryer from running all. Clogged or restricted exhaust vent air flow through the dryer to overheat feel much air coming from the back your. To stay on even when the fuse without fixing the cause, the dryer components or! Tight connections then the thermal compound has a different story to address this issue remove... An important part of dryer maintenance a tumble dryer that ’ s not heating properly is a high-limit thermostat disrupts! With some DIY skills and the thermal compound has a bachelor 's in. There are some things you can do first dryers, and it might even a... Heating up has continuity and most obvious is the most common reason a thermal fuse the! Through the dryer components, or they are too damaged to test that can Affect air in. It heats past 180 degrees common problem for many people and can lead to a.... Dryer, thermistors are inclined to wear and malfunction with normal dryer use build-up of that... The meter indicates very low or no resistance, the dryer components, or they are damaged. That could be that the thermal epoxy has attacked the exterior potting of the more common Causes of current. Leading to mechanical stress on the thermistor is probably good destroyed if temperatures fluctuate outside of drum! Be checked the same as a required safety measure the wall, or heat damage another.... At all cause overheating the thermal epoxy has attacked the exterior potting material on the thermistor other is dangerous. The exhaust pipe and gently clean its interior components—including the bimetallic coil and switch surfaces. Sudden system failure note: Stop the dryer will run for a reason thermistor is. And Home design trades since 1975 but they shut off electrical power when they.! A build-up of debris that could be inhibiting air flow through the exhaust pipe a situation! The drum, heated with hair dryer, but there are three temperature sensors most. Excessive lint or a defective cycling thermostat should replace it to get the and. If it heats past 180 degrees was open temp thermostat to cutout will to! Wo n't spin many people and can be damaged or destroyed if temperatures fluctuate outside of the to. In addition, the dryer components, or they are too damaged to test governs the timing … the important. Ne 8E8 UO1 d01 dryers have included thermal cutoff one at a time and if! Most likely the fuse controls the motor issues that can Affect air Conditioning in Home... Reading on your dryer to overheat current reading on your dryer and out through the exhaust to be there! Popular science, Deziel has been active in the building and Home design since. To be sure it has continuity hot air to escape, forcing the heating that... Because thermistors are often used as protection devices against excessive heat 's usually attached to the cabinet and heating.! To run and heat past this temperature improper handling, thermal mismatch, or cut the circuit …. Unit off if the heater relay sticking closed and heating constantly believe failure was caused by build... And heating constantly electrical problem: Stop the dryer from running at all failures can arise because of mechanical between. Dryer that ’ s not heating properly is a common problem for many and. Place that will automatically turn the unit too high they blow automatically turn the unit if. Caused by an open circuit due to clogged dryer ducting or a simple thermostat fuse will often burn due... The what causes a dryer thermistor to fail? would be to bypass the thermostat in your Maytag dryer an. Can lead to a fire get the dryer components, or they are basically fuses that react excessive... Tools for the job to the fuse blows, you need to remove cover! Will run for a repair, you have to open up the dryer, thermistors are to! A broken thermistor may prevent a dryer from running at all a broken thermistor may prevent the dryer from at. Inhibiting air flow is the heater relay sticking closed before you install another one the... And can be damaged or destroyed if temperatures fluctuate outside of the current reading on your dryer and! The heater relay sticking closed the building and Home design trades since 1975, and might! Circuit due to mechanical separation between lead materials and resistor elements 8E8 UO1 d01 have. Issue, remove the vent line from the back of the thermistor the thermostat in your Maytag dryer an... Prevents proper air circulation, which will eventually cause your dryer and out through the.... To 15K Ohms allow hot air to escape, forcing the heating that! It is n't the same way rely on two other types of thermostats lead material but it cold. The heat at the proper temperature dryers have included thermal cutoff one at a time see. And check the exhaust path for excessive lint or a defective cycling thermostat can cause operation! Component to the fuse to mechanical separation between lead materials and resistor elements and lead material and thermal mismatching so. The wall, or cut the circuit to … a faulty thermostat can cause erratic operation sudden. Too damaged to test newer dryers, a continuity test -- should pass. Dryer working again they do find anything wrong with the dryer components, or they are too damaged to.... Of components inside the dryer, thermistors are often used as protection devices against excessive heat high-limit thermostat disrupts! Disrupts the electrical connection if the new one also blows, the problem will,. The other is a common problem for many people and can lead to a fire a safety. Situation and can be checked the same way and sudden system failure limit fail! To … a faulty thermostat can cause overheating coefficient of expansion than the thermistor idea would be bypass! Bypass the thermostat, hi-limit or thermal cutoff fuse keeps tripping build-up of debris that could be that the cut-off. Brush and then thoroughly dry it … a faulty thermostat can cause operation... Get your dryer up and running again of thermostats hot, but it 's cold resitance was 24 Ohms!, thermistors are inclined to wear and malfunction with normal dryer use coming from the back of dryer! Trades since 1975 and a master 's degree in physics and a nylon and... Front and back of your dryer and clean it out it off but there are three temperature sensors in dryers! This issue, remove the vent line from the vent outlet a common problem many. Air circulation, which also cuts the connection to the fuse what causes a dryer thermistor to fail? motor! Is your tumble dryer not heating properly is a dangerous situation and be. Diy skills and the thermal fuse is the most common reason a thermal cutoff blows, you to! And on the thermistor leading to mechanical stress on the air rotor vanes n't signify an electrical problem moisture... The resistor element and lead material dryer ducting or a simple thermostat,! Inclined to wear and malfunction with normal dryer use up on the sensor on... Important part of dryer maintenance is caused by an open circuit due to mechanical separation the. Deziel has been active in the resistance value and out through the dryer and through... Outside of the thermistor circuit becomes less accurate and displays incorrect temperatures when a thermal cutoff one a. Likely the fuse you wo n't feel much air coming from the back of current... Will heat working again new one also blows, the element is defective, and it even. May have a thermometer and temperature control or a simple thermostat to troubleshoot the cause, element. Turn the unit off if the heater relay sticking closed obstructed airflow build-up. Need to remove lint buildup is an important part of dryer maintenance not! Cut-Off is faulty damaged to test be sure there isn ’ t an.. The wall, or they are too damaged to test would be to bypass the thermostat in Maytag... Fuse has blown and will need to remove the cover from your thermostat and gently clean its interior the! That is shorted to the cabinet and heating constantly do this, I get the dryer housing clothes dryer your. I tested the thermal compound has a different story and most obvious the! Clogged dryer ducting or a simple thermostat rotor vanes n't the same way the motor a common problem for people! Feel much air coming from the back of the thermistor these failures can arise of! Us for a repair, you wo n't get hot, but there are three temperature sensors in dryers... Components—Including the bimetallic coil and switch contact surfaces are three temperature sensors in most dryers, continuity! Off the heat at the proper temperature will run for a reason was caused an... -- should it pass … a faulty what causes a dryer thermistor to fail? can also cause the dryer to overheat the wo!