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Manage My Life

Kenmore dryer stops working when hot.

by Manage My Life Last activity date:
March 3rd, 2011

Recently replaced the motor (see my only other question), replaced the heater element about a year ago. Now dryer runs okay until it gets hot, anywhere from 10 - 30 min, and then stops. Opening the door and closing after cool down 'resets" the dryer, and it will run again. Will shut off 2-3 times during a 60 min cycle. Cleaned inside the dryer and also the vent tubing going out - wide open, no obstructions. Running, it doesn't seem to get too hot, just hot enough. It doesn't stop when it is on delicate (low heat). Thanks for your help.

Tags:
Dryers , Kenmore , Washers
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Answers (5)
Lyle W
The symptoms still point to a bad drive motor. I assume that you press the start button to restart the motor after the cool down period. If the motor is starting on its own without pushing the start button then you probably have a bad push-to-start switch. The dryer would also start without pushing that button whenever you set the dryer in a cycle with the door closed. In that situation, you would need to replace the push-to-start switch. There is a resistance check that you can perform on the motor using a volt/ohm meter.. That test is shown in the image below. If the resistance of the motor is out of range, you will probably need to replace it. If you need more help, reply with additional details and we will try to assist you further.
by Lyle W
March 3rd, 2011
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Manage My Life
I checked the lint screen, and it is clean. There is little lint around the motor, and it was removed. The drum spins manually with little resistance - about what I would expect given the weight of the drum and expected resistance of the belt/motor. Med load of wet towels were added to the dryer, and the exhaust air temp was 104.5 F after the dryer ran for about 40 min. Rechecked several times. I hooked the dryer back up, turned it back on, and it cut off after about 10 min during midcycle. It started again after a bit of time, apparently after "cooldown". The door does not have to be opened and closed in order for it to restart after the wait time. My wife told me she has noticed it is more likely to stop if there is a larger load in the dryer, and less likely if the load is smaller. So, it appears to me to be the motor - it must be overheating though it is new. What do you think? Is there some way to check if the motor is overheating or if it is the temp sensor on the motor? Any other ideas about what might be causing the unit to turn off? Thanks for your help.
by Manage My Life
March 2nd, 2011
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Lyle W
I looked at your previous question regarding this dryer. Here is a link for that previous question:

Kenmore Electric Dryer stopped working



According to your current description, it sounds like the drive motor is overheating. This could be caused by a number of problems. You could have excessive friction in the drive system. A build-up of lint or talc could be restricting the air flow through the dryer. If you bought a used drive motor, you could have a problem with the motor.

Here are some tips that may help:

Be sure that you clean the lint screen before each cycle. I recommend that you periodically wash the lint screen with water and a soft bristle brush to clear any softener residue or other obstructions off of it. This will help the air flow through the dryer.

Open the cabinet and clean out any lint or residue around the drive motor regularly. This should help it cool properly.

Check for excessive friction in the drum by manually spinning it counter clockwise with the dryer empty and shut off. You should detect reasonable resistance since the belt is around the motor pulley but the drum should not be hard to spin. If you detect excessive resistance, check the idler pulley, support rollers and drum seals/glides for causes of that friction. Be sure that you

unplug the dryer

to disconnect electrical power before accessing internal components.

I recommend that you check the operating temperature of the exhaust air coming out of the back of the dryer. Disconnect the flexible exhaust vent hose from the back of the dryer so that it vents directly into your laundry room (bathroom according to your description in the previous question). Ventilate the room as much as possible. Add a medium load of wet towels to the dryer. Start the dryer on a heated cycle. Measure the air coming out of the middle of that exhaust vent on the back of the dryer. It should heat up to about 150 degrees and then cycle between 140 and 150 degrees. If the dryer is heating to over 200 degrees and then cycling off for a while, it is likely using the high limit safety thermostat to cycle the element on and off instead of the normal operating thermostat. This could cause the motor to overheat. In this situation, you would need to replace the operating theromostat (part 3387134) that is on the blower housing.

You can order parts from the

Sears PartsDirect

website.

Be sure that you

unplug the dryer

before accessing internal components.

These tips may help you resolve this dryer problem. If you need more assistance, reply with additional details.
by Lyle W
February 25th, 2011
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Manage My Life
Thanks Joseph. Dryer is model 110.63912100.
Answered in 37 minutes
by Manage My Life
February 23rd, 2011
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Joseph Perez
I understand your concern toward wanting to make sure your dryer is heating properly and not shutting off and I will be happy to help. While you are waiting for an expert answer, I suggest you add to the thread of this question and include the full model number of your dryer so that the expert can provide you with a more detailed answer. I did manage to find a link that describes a similar problem to the one that you are having. I hope my link is useful.
Answered in 8 minutes
by Joseph Perez
February 23rd, 2011
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