Author Topic: Kitchen Aid electric dryer wont start when warm  (Read 150 times)

Offline Thorning

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Kitchen Aid electric dryer wont start when warm
« on: March 23, 2015, 03:10:36 PM »
I am currently working on an older Kitchen Aid electric dryer model number KEYE670BWH2. The dryer was dismantled and cleaned ,reassembled, and hooked up to power. When cold it will start the drum turning and heat well. If the door is opened for any reason after it has warmed up it will buzz and then kick out the overload protector of the motor and will not restart. I have seen this before on other electric dryers and presume the motor bearings are worn and there is too much drag. Is it also a possibility of the blower being the source of the drag ? With the belt off the motor the drum turns fairly smooth by hand. The motor turns OK but not as freely as a new one. Also how do you get blower apart to clean debris out of the inside ? Need advice ASAP.

Offline dab147315

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Offline domain

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #2 on: March 26, 2015, 07:59:38 PM »
Id think stuck centrifugal switch first

Offline fairbank56

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #3 on: March 26, 2015, 08:28:01 PM »

  Sounds like there is a ground leak in the motor. Opening the door completely removes neutral from the circuit so the motor should stop instantly. If it continues to draw current and trips the overload, there must be a ground leak.

Eric

Offline Thorning

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #4 on: Today at 11:04:50 AM »
The dryer operates as normal except when it is warm . It just does not have enough power  when everything is warmed up to start the drum turning. No problem with the centrifugal switch that I can see .I was able to move the switch easily when I had the drum out for cleaning and had access to the motor.  A few months ago I had the same type of problem with another brand of electric dryer and replaced the motor. It appears that these motors have adequate power when they are fairly new but degrade as they get older.  I was looking at an idea of adding a capacitor to the start circuit but dont know how to do it. I know A/C motor/compressors almost all use a capacitor to help start the compressors so I thought it might be an easy fix for this type of dryer problem.

Offline domain

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #5 on: Today at 11:28:57 AM »
Cent switch can look and actuate finr, but that's only half the battle. The internal contacts can cause this.

Offline Thorning

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #6 on: Today at 12:11:00 PM »
I will take another look at those contacts and see if there is a problem with them. Kind of strange that the motor will start the drum when all is cold but will not start it when all is warmed up ?

Offline fairbank56

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #7 on: Today at 12:20:01 PM »

  I misunderstood what you were saying. Thought you said that when the door was opened, the motor buzzed and tripped the overload but obviously, that occurs after you close the door again and try to start it. Check the motor label. Might be one of those made in China motors? Is the motor frame welded together or bolted?

Eric

Offline Thorning

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Re: Kitchen Aid electric dryer wont start when warm
« Reply #8 on: Today at 12:38:58 PM »
I dont have clear access to the motor right now but I am pretty sure it is welded frame. Also I have noted that some dryers have a 1/4 HP motor and some have a larger 1/3 HP. Wish I could find one of the 1/3 HP versions to try in this unit. I have a couple of old 1/4 HP motors in my shop. One of them is for a blower wheel that slips on the shaft which has D shape at the end of the  motor shaft and is retained with a snap ring. The other is for a blower wheel that is threaded on to the motor shaft (with LH threads). Both of them were changed out due to this same problem.

 

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