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Why does the thermal fuse keep blowing in my dryer?

I have a Whirlpool Roper dryer model RED4100SQ0. The serial number is MT3422615. I have replaced the thermal fuse twice and it runs one cycle and the thermal fuse is blown again and needs to be replaced. What could be causing this?

Dryers , Whirlpool , Building Supplies
1 Answer from this member:
by LYLE W. Earned 32,165 community points in Dryers
March 2nd, 2009
Brad Surovec
Lyle, Thank you for your really good step by step directions. We did previously have blockage in the vent tube and I have cleaned it all including the dryer very well. For some reason even after doing all that you said above, the thermal fuse still blows. We purchased the fuse from appliance parts pros. Could it just be a problem with the fuse?
Claude McDonald
If you figure it out, please share your discovery. I've been fighting this problem off and on for a while with our Whirlpool Duet Dryer for a few years. The battle has involved vent cleanings, replacements, and most recently a move to a new home. I have replaced thermal fuses, thermal cutouts, and the heating element. The blower is not clogged or bound. Air is certainly moving. My most recent attempt has revealed broken/corroded crimps from wire to connectors where some arcing has taken place. I have repaired these connections and ohmed out the element as a precaution. I also checked for continuity between element and casing, to rule out a short. If my thermal cutout keeps welding shut and subsequently blowing the fuse, I am at a loss for why. At this point, I am waiting on the arrival of one last part kit of fuse and cutout before I call this one a lost cause. Is there anything else I could be missing?
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