How do you test a thermister? - Dryers

this could be a faulty thermister. this tells the defrost cycle that ice has built up and needs to be melted. A ohm meter can test this component when the ice builds up the resistance of the thermister should change in value . Google how to test a thermister in a freezer.

You can NOT bypass the thermister on a Sta-Rite heater. It needs a value to compare with on the control board.
If you happen to have a fixed resistor available you can use one to test the heater. 7.5k ohms should work.

Do a continuity test on the heater coil. No continuity, it's broke replace it. If it over heated and the coil is ok then the thermal protection fuse blew. Both the fuse and the thermister need to be replaced & check the vent where it exits to the outside. It may be clogged and the cause of the problem in the first place. Very common cause. If not addressed it will break down again. See youtube for videos on how to test the thermal fuse & thermister. Just search "dryer repair". Review a few. Some are better than others.

Hi mdecker1
The way to test a thermister is to remove the wires (tape them together for later use) from it and test the leads coming from the thermistor with an Volt/Ohm meter...it should read continuity across the two leads.
But sometimes they will be bad but show good with the volt/ohm meter, so I also recommend the action below.
The easy way to see if the thermistor is bad is to tape the two wires ends together (see above) and turn the machine on...it it comes on and heats...replace the thermistor.
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E1 can indicate a problem in the dryer's thermistor or its wiring circuit. You can see what a popular thermister looks like at this link:

LINK > Whirlpool/Kenmore Dryer Thermister

It should usually measure in the area of 1.5K - 10K ohms but they can be intermittent and test Ok when out of the circuit and only fail during operation making them difficult to pinpoint as the cause of problems. If all the rest checks out, sometimes the thermister just has to be replaced to see if it solves the problem or not if you have any questions message me back Thanks again Rick

embarham --
Sounds like the Thermister is shorted. The instructions for repair detailed are below. -- SWT

SAFETY NOTICE: Be sure to disconnect power to the appliance before attempting any repairs. If you are not comfortable with doing any voltage checks that might be recommended, please contact your local service provider for repairs. Be aware that there could be sharp edges inside the appliance that could cause injuries to yourself.

The E2 error code indicates an defective thermister circuit. This type of testing will require using a multimeter to check the resistance of the thermister. I have provided you with instructions from the service manual in the image attached below. Be sure to disconnect power to the dryer before attempting repairs.


Thermister; 8577274
Control Board; 661652R
http://www.searspartsdirect.com

Hello,

The reason for the E1 error code could indicate a problem in the dryer's thermistor or its wiring circuit. You can see what a popular thermister looks like at this link:

LINK > Whirlpool/Kenmore Dryer Thermister

It should usually measure in the area of 1.5K - 10K ohms but they can be intermittent and test Ok when out of the circuit and only fail during operation making them difficult to pinpoint as the cause of problems. If all the rest checks out, sometimes the thermister just has to be replaced to see if it solves the problem or not.

God Bless.

Thats a Norcold compact fridge. The most likley problem would be the thermister. Need to do an ohms reading. From inside of the fridge remone the thermister from the fins and unplug the wires. With a VOM set it on Ohms, touch the wires with the probes/ does not matter which probe to wire/ hold the bulb end of the thermister between your fingers, your reading should stat at about 7000 Ohms. Stick the bulb end of the thermister in a glass of ice water, reading should start climbing and go to about 22000 Ohms. If this happens the thermister is good and you need to look elsewhere. If it does not test out you need to replace the thermister. The thermister is a thermostat that controls the heat source that makes the fridge cool. If the thermister reads good you may want to get the circuit board tested.
Hope this helps
Thank you for using Fixya
Jerry

AS LONG AS YOU GET READING THE IS GOOD ,NO READING AND THE PART IS BAD,TRY TO GET ONE OF THE TERMINAL OFF THE HEATER COIL AND YOU STILL CAN TEST IT THAT WAY,MORE THEN LIKEY IT IS THE HEAT ELEMENT BECAUSE EVERTHING TEST GOOD RIGHT?HOPR THIS HELPS,THANKS-MIKE

We offer no warranty as we are just guessing without hands on testing of the problem.