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Just resealed and put new slides in the dryer to have it burn the wires off of the heating element. repaired the wires and it did it again. Checked the thermistor and it ranges from 15Kohms to 2Kohms when heated. Both the high limit and cycling thermostat will open with the use of a lighter. The cycling thermostat took about 15 seconds and the high limit switch took about 30 seconds of blue flame on the sensor with a normal lighter to open the contacts. The only heat damage is at the ends of the wires connected to the heater elements, there are no signs of over current anywhere in the dryer. Before I replace the thermistor, thermal fuse (I think it should have opened), cycling thermostat and the high limit switch, I wanted to ask this forum for their experience and opinion on why the heating element is likely not cycling and the safeties apparently not working properly.
The dryer has been fully disassembled and cleaned.
Your help and input is appreciated Thank you in advance, Mike
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Here are your parts Parts for Amana NDE8805AYW Dryer - AppliancePartsPros.comSee the attachmen http://forum.appliancepa...icons/editor/attach.gift for the wiring diagram. Unplug the unit and both wires at the heating element. Measure across the heating element, should be around 8 to 12 ohms. If OK then measure from each side of the element to it's case, both should be infinite ohms. If not the heater is grounded and should be replaced. If the above is OK. Undo the wires for the heater at the control board and measure across the heater relay contacts, should be infinite ohms. If not the heater relay contacts are welded together. |
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Rank: Member
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Denman,
Thanks for the good diagram and troubleshooting aids. The element measures in at 10 ohms and is open to ground, while the control relay is open, without power applied to the closing coil. The thermistor measures 11.25 Kohms at room temp (70 degrees) and at body temp measures 6.7 Kohms after about 5 minutes of contact, and was still slowly dropping in resistance. Am I right in thinking thermistor is the sensor used to control the heater relay? Ran the diags from the procedures you gave and got two codes, 1. Heater on and drum temp not increasing. 2. Selected dryer temp not reached.
Thanks
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Rank: Advanced Member
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Joined: 2/29/2008(UTC) Posts: 19,638
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[COLOR="Blue"]Am I right in thinking thermistor is the sensor used to control the heater relay?[/COLOR] Yes.
It looks likethe control board is not sensing the change in temperature.
Check the tracks and connection where the thermistor attaches to the board. if they are OK then it is probably a bad board. |
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