Update: I was checking a thermal fuse with my meter and saw a reading that made me stop

I was working on a dryer in a customer's home in Everett last week, and my multimeter showed continuity across the thermal fuse. I was about to move on, but the homeowner mentioned the machine had been getting very hot. On a hunch, I checked the fuse's rating and found it was a 194C part, but my meter only tests for open circuits. The fuse had degraded and was passing current at a much lower temperature, which is why the dryer kept overheating. Has anyone else run into a thermal fuse that tested 'good' but was actually the problem?

3 comments

3 Comments

simon_black17d ago

My Fluke 117 caught a 150C fuse failing at 110C.

uma_patel1917d ago

So your fuse gave up way before its rating? Sounds like it got the Monday morning blues too. That's some serious quality control fail right there. Makes you wonder what else they're lying about on the spec sheet. I'd be sending that back with a very angry note.

rowan_thomas16h ago

Check the datasheet, fuses often have a lower actual trip point.