Why does my dryer keep blowing new thermal fuses?
Replacing a dryer heating assembly or thermal fuse often fails to solve the issue when the new fuse burns out again after just a couple of loads. This leaves owners with a dryer that tumbles without heat and no clear direction on what underlying component to check next.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Replacing the entire heating assemblyDid this help you?
- 2Replacing individual thermal fusesDid this help you?
- 3Checking continuity and resistance of internal componentsDid this help you?
- 4Inspecting exterior vents and exhaust tubes for blockagesDid this help you?
- 5Running a no-heat selection test to check for stuck relays or grounded elementsDid this help you?
- 6Replacing the thermal fuse with a new OEM partDid this help you?
- 7Testing continuity with a multimeterDid this help you?
- 8Inspecting the heating element housing and internal wiringDid this help you?
- 9Replacing the fuse repeatedlyDid this help you?
- 10Cleaning out the vent and interior lintDid this help you?
- 11Replacing the high limit thermostatDid this help you?
- 12Switching from a flex hose to a rigid ventDid this help you?
- 13Keeping a multi-pack of spare thermal fuses on hand to replace them frequentlyDid this help you?
- 14Running loads strictly on low or medium heat instead of highDid this help you?
- 15Running lighter loads and avoiding heavy blanketsDid this help you?
- 16Using manual settings instead of auto featuresDid this help you?
- 17Replacing components such as the heating element and thermistorDid this help you?
- 18Running the dryer on medium heat instead of highDid this help you?
- 19Replacing the other sensor components in addition to the thermal fuseDid this help you?
- 20Cleaning out the exhaust ventDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“dryer stopped drying, replaced thermal fuse…worked for couple days…blew again”source ↗
“Worked for 4 loads of laundry…then back to square one. Disassembled, tested the thermal fuse and it was dead again.”source ↗
“Got a multimeter and discovered thermal fuse has gone out again, but wondering why, vent is clear not clogged, thermal fuse was replaced with an OEM part, I can not confirm but would assume the tech who fixed it also replaced the high limit thermostat”source ↗
“dryer stopped heating but would tumble, then the heat started working again. A few weeks ago heat went out and hasn’t come back since”source ↗
“I have a whirlpool dryer that keeps blowing its thermal fuse. I replaced the fuse, replaced the vent and really made sure it was cleaned out. I also cleaned out the interior of the dryer while I had it open to make sure there was as little lint inside as possible. But the fuse has now blown out a total of 3 times.”source ↗
“Recently it has been blowing the fuse more frequently. Maybe between every 3-5 loads. Sometimes if I run it 3 times back to back it pops.”source ↗
“Completely lost with this. Only thing I can think of is something with the electrical circuit board maybe not adjusting voltage properly or something?”source ↗
“Looking for suggestions on next steps of things to check without giving up and buying a new dryer.”source ↗
“Hello everyone! I have a Samsung DV45H7000EW/A2 dryer and I am having trouble with the thermal fuse on the heater assembly and am not sure what the underlying cause could be. The dryer was working fine for years but quit drying about a month ago and at that time I just replaced the entire heating assembly.”source ↗
“This new assembly worked fine for a couple loads and then quit drying. I found that fuse on both the old assembly and the new one read open when testing resistance.”source ↗
“I'm kinda at a loss for what else I should check. I'm sure there's something I'm missing but can't think of it. If anyone else has some ideas on what else to check I would certainly appreciate it. Thanks!”source ↗
Where this came up
People with this problem also raised
- 2Why does my dryer heating element connector keep burning out?
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- 3Why does my dryer take multiple cycles to dry clothes?
- 2New furnace short cycling every 10 minutes
- 6Gas dryer runs and tumbles but stops heating after a few minutes
- 2Water heater wire burning up at terminal block