Same problem-Whirlpool Thin Twin, dryer thermal cutoff failed twice Reply to Thread
I am having the same problem a you had. I suspect the "thermostat heater" has gone bad, as my unit runs at high heat no matter the selector setting (fairly certain that selector is operating correctly, as the ohms increase as I turn dial to increase heat amount.
Can you tell me what you found to be the fix, as I hate to keep guessing and replacing expensive parts.
Thanks in advance.