Dryer starts when start switch is engaged but stops immediately on release of switch - I.E. must hold switch on for dryer to operate
Kenmore Electric Dryer (63932). When start button is pushed and held, the drum turns, air comes out of the dryer vent but no heat. When dryer button is released, dryer stops. Checked voltages 220/110/110. When dryer start button is pushed and held and the door is opened, the dryer stops. Have set the dryer on each type of drying cycle and pushed the start button, held it but when released the dryer stops. Do not know what else to check. Please advise. Bob
What you describe is either a failed evenheat board or a failed motor relay.
Please post the complete model number from the machine and I can help you narrow it down. There should be a wiring diagram inside the console with voltage checks also.
Thanks/Mike
The start button is ok. If the motor comes on when you press it, it is doing all it is supposed to do.
Open you console and check the motor relay. You should get 50V across the primary terminals when you press the start switch. If you are getting voltage there from the control board, but relay is not closing the contacts for the motor run voltage, the relay has failed.. If you want to check it for sure,
Unplug the dryer and swap the motor relay and heat relay. They are the same part. If the motor runs by swapping relays then you know the relay is out. Or you can jump the relay and see if motor runs, but it will not shut off if you open the door, it will only stop by turning the timer to off position.
If you are not getting voltage to relay from board, then there is a problem with the evenheat board.
Post back and let me know what you find.
Thanks/Mike
To open the console,
Pop off the trim pieces on each end of the console
Remove the screws on each end that hold the console to the cabinet
The console will pull out and flip up and you will see the switches, relays and board.
The motor relay has the pink/black wires and blue wires going to it.
Check for voltage coming from the board on the pink/black wires.
If you don't have 48-50V across these terminals when holding the start switch down, replace the evenheat board.
I expect the board is your problem, If the relay is out, you would still get heat by holding start switch down.
Thanks/Mike
Bob
They are not one part. What I meant is they are interchangable.
From what you are telling me, I expect you will find that the board is not putting voltage to the relays to keep the motor running and latch the heat relay.
If the relay is the only problem, you would still have heat when holding the button down.
It is not likely there is a problem with the centrifigul switch in the motor. If that were the problem you would hear the motor clicking on and off while holding the switch down.
If there is no tech sheet in the console, post me an email address and I will send you a repair manual in PDF.
Thanks/Mike
Bob
Just post an email address and I will send it. Us experts don't have access to the address you provide fixya so you will have to tell me what it is.
Thanks/Mike
From what you are telling me and my experience with them, I say replace the board.
In 8 yrs of working on the evenheat dryers, I have had 1 centrifigul switch go bad in a motor but at least 100 board failures.
Check the manual and do the voltage checks and let me know what you find out.
Thanks/Mike
Also, If the centrifigul switch does not switch to the run winding, the motor would still run when you let off the button, it would just run on the start windings. The start switch and relay don't supply the voltage, they provide the path to neutral.
Mike
No more than handling any other circuit board. I don't use a wrist strap with them, I will usually be touching the cabinet with one hand or knuckle any time I am touching any terminals or the printed circuit. I think you will be fine.
Mike
Bob,
Glad to be of help.
Please mark my solution as solved if you don't care so that I will get credit for the solution. If it goes unrated, the credit will go to the first response.
Thanks for using fixya.com
Mike
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It's most likely the push start switch then if everything is working just holding it down...
try here: http://www.repairclinic.com/SmartSearch/smartsearch.aspx?SearchText=%60ADryer
It's just not latching when you push it... They cost about $8.00 plush shipping from Repair Clinic..
Bill
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The Kenmore model is 110.63932102. Looking a a generic circuit diagram indicates that the centrifigal switch on the motor does two things. (1) it switches the power from the start windings to the run windings and (2)it also closes the circuit to allow the heating elements to heat. It would appear that the motor is only running on the start windings since the release of the start button shuts the unit down. It also is not heating during this time which indicates that the switch in the heating circuit does not close. Questions: (1) could the start button be the problem by not allowing the motor and its relay to operate normally. Is there a way to check the start button? (2) If the motor is disconnected, can the continunity of the start windings and the run windings be check to see if there has been a failure of one of the windings? If both show continunity does that mean the motor is ok? and (3) Is the relay on the motor that switches the windings and closes the heating circuit an intergal part of the motor or can it be replace without replacing the motor?
When the start button is pushed, the drum turns but there is no heat so no matter how long you hold the start button in, there is not heat in the dryer. Can the start button be checked to see if it is working properly?
Mike: I will try your solutions tonight when I get home. Just a comment and a question. Comment: when the start button is pushed the drum turns and there is no heat coming out of the dryer while the start button is held down. You can hold it down for several minutes and still no heat. Drum stops when button released. Does this potentially say that both the motor relay and the heat relay are defective? If I understood you correctly these two relays are combined into one physical body. Is this correct? Please advise. Regards, Bob
Mike, I do not have the tech sheet. A repair manual would be wonderful. Regards, Bob
Mike, it has been a rough day. A light just came on telling me that I forgot to send you my email address. Sorry about that. My email address is: [email protected]. Thanks for your assistance. Regards
Mike, I received the repair manual. Thanks for the extra effort. Let me tell you what I have done. Before I did anything I double-checked the dryer performance. With the start button pressed, the motor runs, air comes from the vent but the air is cold (no heat). When I released the button the dryer shut down. Now, unplugged the dryer, I opened the console as you instructed and swapped the leads between the motor relay and the heat relay. I then checked the dryer performance again after making the swap and nothing had changed - motor runs, not heat and motor shuts down when start button released. With all of the potential of shorting something out I was concerned about trying to check voltages as you suggested so I did not do this. Does this confirm that the even heat board has failed and should be replaced? The "run" winding appears to be working in the motor. Is it possible that the centrifugal switch in the motor or the "motor" winding could be defective and give you the same results as I am experiencing. It is getting late so I haven't had a chanc to look at the manual but will tomorrow. However, with the limitied information I have given you, what is you best recommendation for resolving the problem and returning my dryer and wife back to normal operation? Regards, Bob
Mike, I just ordered the board. Thanks for you help. Are there any electrostatic precautiions that I need to observe in taking the old board off and putting the new one in? Regards, Bob
Mike, just wanted to give you feedback on my dryer repair. The board was the problem. Put the new board in and it works great. When I got to looking at the old board closely, there appeared to be a burned transistor between R2 and C22. Everything is working great including my wife. Thanks for your expert help. Bob
If it is winter, the air flow safety switch might be frozen by air entering the exhaust tube from outside. To check, disconnect the exhaust hose and use a heat gun to backfeed hot air into the burner manifold. This should thaw the switch vane if it is hindered by frost or ice/snow entering from the outside or left over from the last drying cycle. Note if the exhaust hose is plastic you have to use low heat on the heat gun to prevent meling the hose.
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