Main Symptom: Stays heated after a cycle runs and turning the timer to off causes a humming/vibrating sound to come from the timer and the heat stays on even with the door open. What happens & when:
Parts or tests already tried: Replaced the timer with another used one thats supposedly good. They sent me a replacement for the original order and it also does this. Either both replacement timers are bad or i dont know??
Photos / video link:
That sounds like something grounded in the heater circuit keeping the heater powered and one of the contacts stuck closed. Without a model # we are limited on diagnosing this issue. Does the heater come back on as soon as you cycle power onto the unit by plugging it back into the wall or turning it on at the breaker?
You either have a timer switch or motor switch stuck closed, and most likely a grounded out heater circuit, if the unit starts heating as soon as it is plugged in if the timer is not set. If the issue doesn’t occur until the timer is set after power is applied to the unit, then your motor switch is stuck closed and motor 134196602 will need to be replaced.
So basically I need to see if the heating element is touching the frame somewhere and this would explain the sound coming from the timer even when its turned to off position?
I have tried 3 different timers so unless all of them are bad I assume the heating element is grounded?
The heating element could have grounded out within the sheath or it could be a wire that has worn through the insulation and is touching bare metal, I’d suggest visually inspecting the heater and wiring, and checking each terminal on the heater to chassis ground for continuity. Either way, the heating element is getting power at all times when the unit is plugged in. Since the heater may be grounded out, there is the possibility that the timer is going bad as soon as you set it the 1st time after replacing it, but since you’ve replaced it 3 times that is unlikely, you need to check if the centrifugal switch on the motor is stuck closed.
The switch in the motor being stuck closed can also explain the buzzing from the timer, because the timer is constantly receiving voltage along a feedback wire that it should only be getting voltage from when the dryer is running and heating.
