Debate: Should you replace a dryer thermal fuse or just reset it?

I pulled a thermal fuse out of a Whirlpool dryer last week that was blown. Some guys online say you should always swap it new for peace of mind, but an old timer told me to just push the reset button and test the airflow first. I put a new one in anyway, but the dryer still tripped after two loads. Turns out the vent was clogged with lint at the wall, took me 20 minutes to clear it out. So what's your rule - do you always replace the fuse or do you check the vent path first?

2 comments

2 Comments

coleman.jamie1mo ago

Did you check the vent before or after you swapped the fuse? I had almost the exact same situation with my old Kenmore last year, except I was too cheap to buy a new fuse right away so I just reset it and crossed my fingers. The thing ran for about three days before it popped again, and that's when I got down on my hands and knees and actually looked at the vent (hint: it was totally choked with dryer sheet fuzz and a dead mouse, which was nasty). So now my rule is always check the whole vent path first before touching any fuse, because that thermal fuse is just the symptom not the problem if you know what I mean.

sam_anderson1mo ago

Poke around in that vent first every single time. Honestly, swapping a thermal fuse without checking the full exhaust path is like putting a bandaid on a bullet wound. You just proved it yourself - the new fuse blew because the real issue was still there choking the system. Ngl, I think resetting it to test is fine as a diagnostic step to see if it trips again quick, but I wouldn't call that a fix. The fuse is literally designed to fail to keep your house from burning down, so replacing it is the right call once you know the vent is clear.