That $2 thermal fuse stat from the service manual still messes with my head | Appliance Repairers

Daniel Martinez · 2026-10-08T01:40:03.97664+00:00

I was flipping through an old Whirlpool service manual for a dryer I was working on in my garage here in Sacramento, and it said thermal fuses trip at 250 degrees but a clogged lint screen can push the exhaust past 300 in under 10 minutes. That number hit me hard because I've been telling customers for 4 years to clean the screen after every load, and I never knew how fast it actually builds up. Now I pull the back panel on every dryer call, even when the complaint is just "it takes two cycles to dry." Last month I pulled a fist-sized lint wad out of a 3-year-old machine that the owner swore she cleaned, and she was not lying, she just never knew about the lower housing. I even started keeping a cheap IR thermometer in the van to check exhaust temps on the first run. So what temp spikes have you all seen on dryers that still ran fine, and do you bother checking the fuse before the vent?

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That $2 thermal fuse stat from the service manual still messes with my head | Appliance Repairers - The Community Guide