Whirlpool Cabrio

[caepperson3]

Model Number: WED6400SW0
Brand: Whirlpool
Age: 6-10 years

This thing keeps blowing the thermal fuse! I've changed the fuse an the thermistor. I checked the Element 39.5, high limit thermostat .3, thermal cutoff .2. Well now I've lost both the thermal fuse and thermistor. Please help remedy my problem.

Thank you
Clyde Epperson

[Doc Ryan]

The heating element on your dryer has two heating coils. Unplug the dryer and remove the wires to the heating element and check to see if the element is shorted. Check to see if the element has continuity from the element terminals to the cabinet of the element. Let me know what you find. How long did the dryer run before blowing the new fuse?

[caepperson3]

Elements 39.7, Elements to cabinet infinity

[caepperson3]

fuse lasted 19 days

[Doc Ryan]

What is the part number of the fuse that you replaced?

[caepperson3]

I'm replacing thermal Fuse 3392519, thermistor 8577274

[Doc Ryan]

Thank you. Have you inspected the exhaust vent to see if there are any restrictions restricting the air flow?

[caepperson3]

I checked exhaust vent and found it to be clean and have good air discharge.

[Doc Ryan]

If the exhaust airflow is good and the heating element is not shorted, then it is most likely a failure of the main control board since you have already replaced the thermistor. The thermistor has to be tested at a higher ohm scale. With the thermistor pulled out of the dryer, it should read approximately 11.9K Ohms at 70°F and 9.2K Ohms at 80°F. It sounds like one of the relays on the main control board might be "sticking" which will cause the dryer to heat when it is not supposed to. Try putting the dryer on an air dry cycle (no heat), and see if you still get heat.