Dryer Runs But Doesn't Heat — Causes and Fixes
A dryer that tumbles but stays cold is one of the most common laundry repairs, and several causes are DIY-friendly. The cause differs slightly between electric and gas dryers — here is how to work through it.
1. Check the Vent First (Both Types)
A clogged vent causes the dryer to overheat and trip its thermal fuse, which then kills the heat. Clean the lint trap and the full vent run before anything else — a restricted vent is the root cause behind many "no heat" repairs and it will keep killing parts if you do not fix it.
2. Electric Dryer: Check the Breaker
Electric dryers use a 240V double breaker. If only one half trips, the drum still turns (120V) but the heating element gets no power. Flip both halves of the dryer breaker fully off and back on.
3. Thermal Fuse
A blown thermal fuse is an extremely common no-heat cause — it is a one-time safety device that trips (usually from a clogged vent) and must be replaced, not reset. It is cheap and a straightforward DIY test/replacement with a multimeter. Fix the vent too, or it will blow again.
4. Heating Element (Electric) or Igniter (Gas)
On electric dryers, a burned-out heating element is a frequent no-heat cause — testable for continuity and replaceable. On gas dryers, a failed igniter or gas valve coils stop the burner from lighting. Both are common, moderately involved DIY repairs.
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FAQ
Most often a blown thermal fuse (from a clogged vent), a half-tripped 240V breaker on electric models, or a failed heating element/igniter. Clean the vent first — it is the usual root cause.
No. A thermal fuse is a one-time device — once blown it must be replaced. Always clear the vent restriction that blew it, or the new one will fail too.
Always unplug an appliance and shut off its water supply before servicing. This guide is informational and not a substitute for a qualified technician.