Question about Maytag MED9700S Electric Dryer

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I've located the thermal fuse on the blower housing and there is no continuity. Next to it is the drier thermister and I have no continuity there either. If I replace the fuse where do I go from there? Drier is a Maytag, MED 9700SQ0 the fuse part number is AP3132867, the thermister is AP3919451.

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The thermal fuse is blown open due to the thermistor being open (no continuity). The thermistor is a negative temperature coefficient resistor in which the resistance varies inversely with the temperature. Since the thermistor is open (infinite resistance), the electronic control board "thinks" the dryer temperature is too low. It then activates the heater relay continuously which makes the dryer overheat and blow the thermal fuse open to stop the motor which eventually turns off the heating element. Replace both the thermal fuse and the thermistor and it should your problem. They are manufacturer part numbers 3392519 and 8577274, respectively. The part numbers AP3132867 and AP3919451 are used only by www.partselect.com.

Posted on Apr 02, 2011

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1 Answer

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Disconnect the dryer vent turn it on. If it blows it works. If that's not the problem it's going to be the coils, thermal fuse or thermister. All are easily tested with a continuity tester after you open up the housing.

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My samsung drier is not heating


Hi bunnyb609
Here are a few things to check:
ALWAYS UNPLUG YOUR DRYER BEFORE ATTEMPTING TO DO ANY WORK ON IT.
Check to make sure you are getting full 220 Volt power to the dryer, if you are then:
Check your Wiring
Often the main wiring connection from the house, at the dryer, burns and the connection breaks. If this has happened to your dryer, you need to replace the power cord and the terminal block inside the dryer to which the wire is attached.
Check the Door Switch
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Check to make sure you heating problem is not a lint build up in the discharge hose or inside of the dryer venting system,as this condition can cause heater/thermistor problems such as overheating of the heating coil leading to failure of the coil and burnout of the heating element/thermostat/thermistor due to overheat.
Remove the back/or front just under the door of the machine and try to locate the air duct going from the blower to the drum. Normally inside/outside the air duct you will find the heating coil and the thermostats/thermistors. Once you have located the heating coil, remove the two wires from it and check the coil with an ohm meter across the two terminals of the coil.
You should read continuity across the terminals, if you do not read continuity you will need to replace the coil as it is faulty.
If the heating coil is ok, then:
You can check the thermostat/thermistor/thermal fuse one at a time by removing the two wires and taping them together with electrical tape.
Try to run the dryer, if it runs and heats up then replace the thermal fuse/thermistor/thermostat.
If you have an ohm meter then you can test the thermostat/thermistor/thermal fuse,then you do not have to tape the wires together as described above.
But do not trust the ohm meter all the time, because sometimes it will give a false positive that the fuse is ok when in reality it is faulty.
DO THE FOLLOWING TEST:
To test your thermostat/thermistor/thermal fuse remove the wires from the thermostat/thermistor/thermal fuse and check the fuse/thermostat,thermistor for continuity, if you DO NOT have continuity then replace the thermostat/thermistor/thermal fuse.
DO NOT LEAVE THE WIRES TAPED TOGETHER AFTER THE TEST AS THIS COULD CAUSE A FIRE BECAUSE YOU HAVE REMOVED THE SAFETY.
This test of the thermal fuses,thermistor,thermostat, will show if the thermal fuse,thermostat,thermister is really faulty or not.
Check your blower wheel to make sure it is secure to the shaft and not plugged with lint,socks,etc. If you have to replace your blower wheel it will remove clockwise as looking at the blower wheel. You will have to hold the belt end of the motor with a vise grip pliers or maybe the shaft of the motor has a notch cut on it for a wrench to fit.
If the thermal fuse overheats the dryer will not operate. It's located on the blower housing. It cannot be reset.
You can test it with an Ohm meter or continuity checker, remove both wires from the thermal fuse and put the test probes to each of the ends of the thermal fuse, if no continuity then replace the thermal fuse.
If you do not have a volt/ohm meter then:
DO THE FOLLOWING: Remove the wires and tape them together and try to start the dryer.If the dryer starts then replace the fuse.
A vent clogged with lint can cause it to overheat.
Right after replacing a dryer element, always run the dryer on air fluff/no heat, and go outside to verify there's plenty of air coming out your vent system.
If the vent's clogged, that new element can burn out very quickly.
For video and pictures on how to replace a generic element go to the following website:
davesrepair.com/DIYhelp/DIYreplacingWPLdryels.htm
Please take time to rate me
Bud

Mar 13, 2013 | Dryers

1 Answer

Manual for leq1442eso


As you have already tried checking limits then the problem is with the thermal fuse in most cases. When the thermal fuse goes bad it cannot be reset and replacing it is the recommended repair. It is located on the blower wheel housing inside the rear panel to the exhaust duct. You can test it for continuity before replacing.

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1 Answer

I have a Bosch Exxcel tumble drier. Every few minutes the machine stops and the red


Hello & Welcome to FixYa
If you have already cleaned the vent then the problem is with the Thermal fuse. When the thermal fuse goes bad it cannot be reset and replacing it is recommended repair. It is located on the blower wheel housing inside the rear panel to the exhaust duct. You can test it for continuity before replacing.Please get back to me if you have any other questions.
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2 Answers

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Hi edelozier..

Here are a few things to check:
ALWAYS UNPLUG YOUR DRYER BEFORE ATTEMPTING TO DO ANY WORK ON IT.
Check to make sure you are getting full 220 Volt power to the dryer, if you are then:
Check your Wiring
Often the main wiring connection from the house, at the dryer, burns and the connection breaks. If this has happened to your dryer, you need to replace the power cord and the terminal block inside the dryer to which the wire is attached.
Check the Door Switch
If the door switch or the door-switch actuator is defective, the dryer won't work and you need to replace the failed component. The switch is inside the dryer main housing near the door frame. Sometimes you need to raise or open the top or front of the dryer to reach the switch. Check for continuity you should have none with door open, and should have a reading when closed. If not replace the door switch.
Check to make sure you heating problem is not a lint build up in the discharge hose or the dryer,as this condition can cause heater/thermistor problems such as overheating of the heating coil leading to failure of the coil and burnout of the thermostat/thermistor due to overheat.
Remove the back/or front just under the door of the machine and try to locate the air duct going from the blower to the drum. Normally inside/outside the air duct you will find the heating coil and the thermostats/thermistors. Once you have located the heating coil, remove the two wires from it and check the coil with an ohm meter across the two terminals of the coil.
You should read continuity across the terminals, if not you will need to replace the coil as it is faulty.
If the heating coil is ok, then:
You can check the thermostat/thermistor one at a time by removing the two wires and taping them together with electrical tape.
If the coil heats up then replace the thermostat/thermistor/thermal fuse as it is faulty.
If you have an ohm meter then you can test the thermostat/thermistor/thermal fuse,
then you do not have to tape the wires together as described above.
To test your thermostat/thermistor/thermal fuseremove the wires from the thermostat/thermistor/thermal fuse and check for continuity, if you DO NOT have continuity then replace the thermostat/thermistor/thermal fuse.
DO NOT LEAVE THE WIRES TAPED TOGETHER AFTER THE TEST AS THIS COULD CAUSE A FIRE BECAUSE YOU HAVE REMOVED THE SAFETY.
Check your blower wheel to make sure it is secure to the shaft and not plugged with lint,socks,etc.
If the thermal fuse overheats the dryer will not operate. It's located on the blower housing. It cannot be reset.
You can test it with an Ohm meter or continuity checker, remove both wires from the thermal fuse and put the test probes to each of the ends of the thermal fuse, if no continuity then replace the thermal fuse.
A vent clogged with lint can cause it to overheat.
Right after replacing a dryer element, always run the dryer on 'air fluff' / 'no heat', and go outside to verify there's plenty of air coming out your vent system.
If the vent's clogged, that new element can burn out very quickly.
For video and pictures on how to replace a generic element go to the following website:
davesrepair.com/DIYhelp/DIYreplacingWPLdryels.htm
Please take time to rate me

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1 Answer

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Hello there and thank you for choosing fixya
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HERE IS WHAT IT LOOKS LIKE
tbirdfan1_96.jpg

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The thermal fuse is located on the blower housing outlet to the left of the thermistor. For electric dryers, the thermal cut-off and high-limit thermostat are located on the heater housing. For gas dryers, the high-limit thermostat and the flame sensor are located on the burner.

Disconnect the dryer from the power outlet and turn-off the gas supply for gas dryers.

Remove the two screws at the bottom of the toe panel securing it to the cabinet. Pull the toe panel down and off the cabinet.

Check the continuity of the thermal fuse with an ohmmeter set to X1. The ohmmeter should read zero ohms. Replace both the thermal fuse (part #3392519) and the thermistor (part #8577274) if the resistance reads open or infinite. Remove the securing screws and install the replacement part.

Do the same with the thermal cut-off. Replace both the thermal cut-off (part #279973) and the high-limit thermostat (part #3391914) if the resistance reads open or infinite. Remove the securing screws and install the replacement part.

The high-limit thermostat is located next to the heater terminal block and next to it is the thermal cut-off.

Slide the toe panel in place up and into the cabinet and secure it with the screws.

Note: Disconnect the wires from the terminals of the component before performing the continuity test.

Feb 22, 2010 | Washing Machines

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