I have an Amana NED7200TW suddenly stopped working. Power is on, panel lights up. replaced the thermistor still will not start. no error codes come up. What else should I look at?

Amana NED7200TW Technical Information - ManualsLib

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Hi Marissa,
Have you run the diagnostic program to find the fault?
Your problem could be the high limit thermostat, thermal fuse or the heater. Take the panel off at the back and locate the tech sheet. On the tech sheet you will find the instructions for running the diagnostic program. Run the diagnostic program and this will tell you where the problem is and the corrective actions needed.
It is a bit involved to get at the thermistor, but easy to replace. see http://www.youtube.com/watch?v=mCmGRijX_14, as this leads you through the process very well.

test the thermostat and thermistor too and replace, if the problem persist, clean the ducts, or need to replace the control board if the problem . If the problem continue
make this test.
1. Enter to Service Mode by press CHIME and TEMPERATURE keys for 3 seconds or until 3 beeps are heard.
2. Access Diagnostic Codes by pressing WRINKLE PREVENT. A d will be displayed. Rotate the CYCLE SELECTOR KNOB in either direction to read it.
3. Press SENSOR DRY and TIME keys for 3 seconds to clear it.
4. Power OFF to exit Service Mode
5. Power ON

Check to see if your thermistor is bad by measure the resistance. It should be 10K Ohms at room temperature.
If it's bad, replace it BUT you have to CLEAR to error code.
1. Enter to Service Mode by press CHIME and TEMPERATURE keys for 3 seconds or until 3 beeps are heard.
2. Access Diagnostic Codes by pressing WRINKLE PREVENT. A d will be displayed. Rotate the CYCLE SELECTOR KNOB in either direction to read it.
3. Press SENSOR DRY and TIME keys for 3 seconds to clear it.
4. Power OFF to exit Service Mode
5. Power ON

It is actually error code "tS" which stands for thermistor shorted. The control interprets it as an extremely low resistance which is a result of a the dryer overheating. Locate the thermistor on the blower housing and replace it. Click on the link below and refer to the parts diagram then look for item number 27(thermistor).

Amana NED7200TW Electric Dryer Bulkhead Parts

Click on the link below if the error code still appears after replacing the thermistor.

Persistent Error Code "tS" on Amana NED7200TW Electric Dryer

The error "tS" actually means the thermistor is shorted. It flashes when the thermistor is indeed shorted, the thermistor wires are shorted, or the timer/control is faulty. There's no necessity to reset the machine. The problem here is not the thermistor but a shorted wire or a faulty timer/control. One simple way to find out is by disconnecting the thermistor and insulating the wire terminals then starting the dryer. If the error code does not vanish, then it is proven with moral certainty that there is a wire short circuit or a timer/control problem. Check and make sure that there's no such wire short circuit or no part of which is touching the dryer cabinet then if the error is still there, disconnect the wire harness from the the timer control. The timer/control is indeed faulty if the error code persists even after the wire harness is disconnected therefrom.

You have a faulty thermistor if the error code vanishes after the thermistor is disconnected. Normal thermistor resistance is around 10000 ohms at room temperature.

The upside looking F is really a lower case T and the 5 is an S. The code ts is related to the Thermistor which is on the outside of the blower housing. The part runs about $30

hE=Heater error, Restricted vent. Replace thermistor. you can bypass the thermistor for test purposes by taping the wires together. it is located on the blower wheel assembly, here are pictures of opening the dryer. once it is verified that the thermistor is the problem untape the wires and replace. this is a fire safety feature and should never be operated in the bypassed mode. Safety First, unplug before opening. hope this helps Tim:

http://www.appliancehelponline.com/dryerblowerassy.html

I have a gas model but this is what I found on the sight and it helped :

dt63 2 Solutions February 27, 2010
Check to see if your thermistor is bad by measure the resistance. It should be 10K Ohms at room temperature.
If it's bad, replace it BUT you have to CLEAR to error code.
1. Enter to Service Mode by press CHIME and TEMPERATURE keys for 3 seconds or until 3 beeps are heard.
2. Access Diagnostic Codes by pressing WRINKLE PREVENT. A d will be displayed. Rotate the CYCLE SELECTOR KNOB in either direction to read it.
3. Press SENSOR DRY and TIME keys for 3 seconds to clear it.
4. Power OFF to exit Service Mode
5. Power ON

That is actually a Ts error.

Thermistor Short Sensed

The Thermistor resistance is very low.
Check for:
- Clogged lint screen.
- Restricted vent system.
- Check Thermistor resistance.

Thermistor is Item #27 HERE


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