Maytag Centennial Dryer, Model # MEDC400VW0, firstly replaced just the thermal fuse (part#3392519) and cleared all venting, fuse blew again. Secondly, replaced Internal bias operating thermostat(Part#3387134), High-limit thermostat(3977767) and used Thermal cut-off fuse kit(3977393) and again thermal fuse (3392519). Dryer ran about 15 minutes and fuse blew again. Other information for diagnosis, dryer runs same heat in all cycles including fluff or no heat cycle. At a loss as to what is causing the heat to run constant, causing the overheat and fuse to blow.
Have you checked then heating coil?
Check the heating coil.
Unplug the unit and both wires to the coil.
Check it with a meter, should be around 10 to 12 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case. This can cause it to run on high and the thermostats cannot regulate it so the thermal cut-off blows.
Thank you Denman, the coil was touching the case as one of the ceramic holders had broken. In the past I have had broken heater coils, but they just stopped producing heat. This was the opposite, it was producing too much heat.
You are welcome
And thanks for getting back to us. Now when others search for a similar problem they will see what actually worked instead of just suggestions about what could be the cause.