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Author Topic: No heat  (Read 268 times)

Offline DanAllan

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  • Member Since: Apr 2019
  • Posts: 19
No heat
« on: August 09, 2019, 02:22:36 PM »

I have an Amana dryer model number ned7200tw.
The heating relay is not engaging. I can take the two wires off of the relay connect them together and the dryer heats. I have replaced the board and still have the same problem the relay itself will not connect l1 to the blue wire. Any ideas I would appreciate thank you

Offline manden

  • Technician
  • Member Since: Oct 2011
  • Posts: 280
Re: No heat
« Reply #1 on: August 10, 2019, 12:15:02 PM »
Have you checked the thermistor?
Should be 10,000 ohms at 77 degrees F

It looks like this unit is close to a MDE9700 so the following may be useful to you.
https://drive.google.com/file/d/0BzIiBNwRIV4NR0lYSWRKVmd3UDg/view
« Last Edit: August 10, 2019, 12:17:30 PM by manden »

Offline DanAllan

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  • Member Since: Apr 2019
  • Posts: 19
Re: No heat
« Reply #2 on: August 13, 2019, 09:16:30 AM »
No I did not check the thermistor I was using time dry as well and that should pull the thermostat out of that circuit and just work off of the thermostats. But the information that you sent me show that the membrane switch being stuck open could be the key to my problem thank you very much

Offline manden

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  • Member Since: Oct 2011
  • Posts: 280
Re: No heat
« Reply #3 on: August 13, 2019, 10:07:50 AM »
I may be wrong but as far as I know the thermistor is used for all heating modes.

The thermostats are just safety devices.

Offline DanAllan

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  • Member Since: Apr 2019
  • Posts: 19
Re: No heat
« Reply #4 on: August 13, 2019, 10:17:06 AM »
I know on some models the thermistor was only in the circuit for the automatic cyclesI in units with an operating thermostat as well but I think you  are right on this unit. Thank you

Offline dab147315

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  • Member Since: Oct 2010
  • Posts: 5162
  • Country: us
Re: No heat
« Reply #5 on: August 13, 2019, 10:31:15 AM »
Thermistor for sure is used for all cycles. Tech sheet as a diagnostic mode to did you use it?
Do what Manden says check thermistor!