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Hi,
Thanks in advance for any responses. My dryer stops mid cycle with no fault indication. It seems to happen right around 7 - 8 minutes into the cycle. I thought not having an error code would have ruled out the thermistor(it is not open or shorted, although the resistance is 4k[tested after shutting off] not 10k [12k after sitting overnight]). The other reason I thought it wouldn't be the thermistor is that the machine starts and runs right away for about another 7- 8 minutes. I tested the thermal switch (still close after shutting down) and fusing relative to the control circuit and nothing is opening.
It happens at any heat level and fails fairly consistently in between 5 - 10 minutes. I haven't run it enough times to be 100% for sure the time is consistent. I think I have run and tested about 8 cycles to the failure point. I didn't time the first several but I did notice the consistency in time and start checking it.
Mike K
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Monitor voltage to ground at thermal fuse terminal that goes to motor. When motor stops, if you still have 120vac there, then problem may be door switch or motor thermal overload tripping. Check motor for excessive lint buildup. Check to see if drum is binding when you rotate by hand. If no 120vac on either thermal fuse terminal when motor stops, looks like faulty control board but first, check connections at dryer power cord terminal block. Unplug dryer, make sure connections are clean and tight. Your thermistor readings seem normal. Resistance value varies with heat. As it gets hotter, resistance decreases.
Eric
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Hi Eric,
I have ruled out the thermal cutoff(temporarily jumped) but not the high limit thermostat. If I open the door mid cycle the machine stops differently (LED are still on). I was sort of thinking this ruled the door switch out but maybe not based on the wiring ( possible loose connection). The motor spins freely and has no obviously binding or bearing issues. I'm thinking that if the thermal cutout on the motor opened it wouldn't be able to re-start right away but I can restart immediately.
I had been leaning toward some sort of motor issue because the blower seems oscilate quite a bit (at least that is how it sounds ) but you may be exactly right about the control board. Does the motor ever sound like it isn't running smooth on an electric dryer.
Thanks,
Mike
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It wouldn't be the hi limit thermostat because that is not in the motor circuit. Monitoring the voltage at the thermal fuse would tell you for sure if the problem is the control board.
Eric
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Hi Eric,
It looks like you nailed it. The control board is shutting off the machine at exactly ten minutes when selecting a specific cycle. If I do a timed dry it runs without stopping. Do you know.... is there a way to reset these boards? Iv'e seen once or twice where an industrial circuit board got caught in a logic loop and there was a way to reset the chip. I don't know if that is even feasible on one like this. Thanks so much for your help.
Mike K
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Are you saying that in timed dry, it never stops, or it does stop at correct time? If latter, problem may be the sensor pad at back of drum needs cleaning. This sensor is only used in auto dry cycles. Wet clothes falling across the sensor bars create a short circuit telling the control board that the clothes are still wet. If they are dirty or the wiring to them is faulty, it may not be detecting moisture properly and cutting the dryer off early. Here is your parts manual. Sensor is number 25 on page 5. http://shared.whirlpoolc...20List%20-%204320139.pdfEric
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Hi Eric,
For whatever reason it works perfectly fine in a timed dry. When using the custom selection options (Delicate, Knits, Normal, Heavy Duty) it shuts down after 10 minutes no matter what. The solution for now, to me, is to just run it timed and see if any more issues come up.
Mike
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Rank: Member
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Oh wow,
That sensor is only @$20 I will order one and see if this clears up the whole issue.
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