My Frigidaire dryer won’t stop running if the door is closed. It runs without heat and without being turned on by the control panel. The only way to stop it from running is to keep the door wide open or unplug it. What part would this be connected to? I’ve tried resetting, letting a cycle time out, unplugging several times, etc. Nothing works.
It sounds like a stuck motor relay, probably on the control board.
Frigidaire 137070850 Control-Electrical - AppliancePartsPros.com
I have to open the door or unplug it to make it stop running. Did the relay fix your problem?