Dryer: Won't turn off
The load is dry, yet the dryer keeps running and running. Before that unnecessary heat damages your clothing and drives up your utility bill, fix the problem with one of the repair suggestions below.
These repairs may help solve your Dryer problem:
Replace the dryer timer
The timer on the control panel lets you set the drying time by turning the timer's control knob. A small motor on the back of the timer advances the timer during the cycle. The timer's internal cams open and close switches or contacts to operate the various electro-mechanical components in the dryer (mainly the drive motor and the heating element). Replace the timer if the contacts aren't working, the dryer won't start, heat or the timer won't advance.
Replace the dryer push-to-start switch
For dryers with mechanical controls instead of electronic controls, the push-to-start button starts the drying cycle when the user presses and releases it, by completing the voltage path through the drive motor. If the push-to-start switch isn't completing the electrical circuit to start the dryer, replace it.
Repair or replace the dryer electronic control board
The electronic control board governs the timing and execution of dryer functions. The wiring connections on the control board can be repaired, but the control board itself cannot. Replace the electronic control board if it's receiving voltage but isn't transmitting it to the dryer components, causing the dryer to not work. It can be difficult to determine if the electronic control board is the problem (unless you see burn marks on it) and it's an expensive part that can't be returned once installed; for that reason, have a trained service technician perform advanced diagnostics on control board before you replace it.
Replace the dryer door switch
The dryer door switch detects whether the dryer door is open or closed. The dryer won't start if the door switch senses that the door is open. If the switch reads the door as being open when it's shut, or if it allows the dryer to keep running when the door is open, replace it.