Drum spins but no heat
Blown thermal fuse (from a clogged vent) is the #1 cause. Don't skip vent cleaning or it blows again in a week.
Diagnostic flow
- 1
Unplug & remove the back panel
Six 1/4" screws across the top edge of the rear panel.
- 2
Test the thermal fuse
Located on the blower housing, white plastic 2-terminal device. Continuity = good; open = blown.
- 3
Test the heating element
Electric dryers only. Element coils should read ~10–50 Ω. Visibly broken coil = replace.
- 4
Clean the full vent run
Disconnect at both ends. A 25-ft brush kit gets the wall section. Half of all 'bad heater' calls are clogged vents.
- 5
Replace thermal fuse
Always pair fuse + thermostat replacement — they share a heat profile and degrade together.
Recommended parts
Thermal fuse 3392519
$10–$15
High-limit thermostat 3977767
$15–$25
Heating element W10836011
$45–$80
OEM matches verified by FixGrid AI. Affiliate links may apply.