Dryer Not Heating? The 6 Causes, in the Order a Tech Checks Them

01Step 1: clean the full vent path

A no-heat diagnosis starts with the vent — the whole path from the dryer outlet to the outside hood, not just the lint screen. Disconnect the dryer, pull the flex duct, clear any lint buildup along the rigid duct run, and confirm the outside hood flap opens freely. While you are back there, check the duct material itself: federal building guidance on dryer venting calls for rigid or semi-rigid metal duct, because plastic and foil duct sag, trap lint, and restrict airflow.

In Palm Beach County, palmetto bugs, bird nests, and dryer sheets often block the outside hood. A clogged vent is the root cause of thermal fuse failure, which shows up as a dryer not heating. Replacing the fuse without clearing the vent guarantees repeat failure inside weeks — see how often dryer vents need cleaning in Florida for the schedule that prevents it.

02Step 2: test the thermal fuse

A thermal fuse is a one-time safety device on the blower housing. If the dryer overheats (usually from restricted airflow), the fuse opens and the dryer loses heat but may still tumble. A blown fuse tells you two things: the fuse needs replacement, AND the vent needs cleaning.

Unplug the dryer, access the fuse (location varies by model — usually on the blower housing at the rear or bottom), and test for continuity with a multimeter. No continuity = blown. Replace the fuse — and clean the vent that blew it, or the new one fails the same way.

03Step 3: electric dryers — test the heating element

Electric dryers use a coiled heating element at the back of the drum housing. Elements fail from age (coil breaks), from burning out against a restriction (see: vent problem), or from electrical surges.

Visual inspection: remove the element housing. A broken element usually shows visible damage — a broken coil loop or a burn spot. Test with a multimeter for continuity across the element terminals — a good element reads around 8–15 ohms. Infinite reading = broken.

Replacement runs $60–$150 parts, 30–60 minutes labor.

04Step 4: gas dryers — check igniter and gas valve coils

Gas dryers have an igniter (glows orange when heat is called), a flame sensor (signals gas flow), and two gas valve coils (open the valve for burner operation).

Igniter failure is most common: it cracks, oxidizes, or simply wears out. Visual check — run a heat cycle in a darkened laundry room and watch the burner assembly. No orange glow = failed igniter, replace it ($30–$60 part).

If the igniter glows but gas doesn't flow, the coils have failed. Replace both coils together — they share age and load.

05Step 5: thermostats and thermistors

Dryers use multiple thermostats: cycling thermostat (controls normal operation), high-limit thermostat (safety backup), and temperature sensors (thermistors on newer models). Any of these can fail open, causing no heat or intermittent heat.

Test each with a multimeter for continuity at room temperature (should show continuity). Any thermostat that shows open at room temperature has failed and needs replacement. Typical cost $20–$40 parts.

06Step 6: control board

The control board is the last and most expensive suspect. A failed board can prevent heat cycles from firing even when every other component tests good, so it is diagnosed by eliminating all other causes first.

Control boards run $150–$350 on most dryers. On units over 10 years old, replacement often makes more sense than repair — get an apples-to-apples comparison before proceeding.

If the dryer's display is flashing an error code, decode it before condemning the board — the Frigidaire dryer error codes guide covers the codes we see most often on no-heat calls.

07What each no-heat repair typically costs

Most no-heat dryer repairs in Palm Beach County cost between $150 and $350, parts and labor included. Vent cleaning with a thermal fuse sits at the low end of that range, and a control board sits at the high end. The table below matches each cause to its telltale sign and typical cost, using the same figures quoted through this guide.

If the dryer still will not heat after the vent and fuse checks, book professional dryer repair in Palm Beach County rather than guessing at parts — a flat-rate quote after diagnosis beats replacing components one by one.

08Safety: never bypass the thermal fuse

Bypassing the thermal fuse to get the dryer working again is never the fix. The fuse exists to prevent fires — the U.S. Fire Administration counts about 2,900 residential clothes dryer fires a year, and failure to clean is the leading contributing factor. The fuse is blowing for a reason; fixing the reason is the repair, not bypassing the fuse.

Also: never run a dryer with the exhaust vent disconnected or blocked. The carbon monoxide risk on gas dryers is real, and electric dryers will re-blow the thermal fuse within hours.