Why Is My Dryer Not Heating?
Updated June 2026 · Based on 17+ years of Treasure Coast service calls
The most common cause is a blown thermal fuse (triggered by a clogged vent). Check two things first: (1) your breaker panel — electric dryers use two breakers, and if one trips the motor runs but the heater won't; (2) your dryer vent — disconnect it and check for lint buildup. If both are clear, you likely need a thermal fuse, heating element, or thermostat replacement. Repair cost: $100—$350.
Check These Two Things First (Free Fixes)
Before calling anyone, check these — they solve about 20% of "not heating" complaints and cost nothing:
Circuit Breaker (Electric Dryers)
Electric dryers run on 240 volts, which requires two breakers (or a double-pole breaker) in your panel. If one side trips, the motor gets power (120V) but the heating element doesn't. The dryer tumbles normally but produces zero heat. Go to your breaker panel, find the dryer breaker, flip it fully OFF, then back ON. If it trips again immediately, there's an electrical fault — call an electrician.
Clogged Dryer Vent
A blocked vent is the root cause behind most dryer heating failures. When hot, moist air can't escape, the dryer overheats and triggers its safety devices (thermal fuse, high-limit thermostat). Pull the dryer away from the wall, disconnect the vent hose, and look inside. If you see packed lint, clean the entire run from the dryer to the exterior wall cap. In Florida's humidity, lint gets damp and sticks — our technicians across Port St. Lucie and Stuart pull out lint plugs the size of a football. Clean your vent at least once a year — more if you run your dryer daily.
The 4 Parts That Fail (When It's Not the Vent)
1. Blown Thermal Fuse (#1 Cause)
The thermal fuse is a one-time safety device on the exhaust duct inside the dryer. When the dryer overheats (usually from a clogged vent), the fuse blows and cuts power to the heating circuit permanently. It cannot be reset — it must be replaced. A thermal fuse costs $10—$30 for the part, but the labor to access it, test it, and replace it runs $100—$200 total. Critical: if you replace the fuse without fixing the root cause (the clogged vent), the new fuse will blow again within weeks.
2. Failed Heating Element (Electric Dryers)
The heating element is a coil of resistance wire that glows red-hot to produce heat. Over time (8—12 years), the coil can break or short out. When it fails, the dryer tumbles but the air stays cold. On some models, you can see the element through an opening at the back. If the coil is visibly broken, that's your answer. Cost: $150—$300 including parts and labor.
3. Faulty Cycling Thermostat
The cycling thermostat monitors the dryer's internal temperature and tells the heating element when to turn on and off. When it sticks open, the element never gets the signal to fire. This requires a multimeter to test — the thermostat should show continuity at room temperature. Cost: $100—$200.
4. Broken Igniter (Gas Dryers Only)
Gas dryers use an igniter — a glowing element that lights the gas burner to produce heat. Igniters are fragile and crack over time. If the igniter doesn't glow, the gas valve won't open (safety feature) and no heat is produced. You might smell a slight gas odor during the first minute as the system tries to light. Cost: $150—$250.
A dryer that won't heat is often a dryer that was overheating — and that's a fire risk. Clogged dryer vents cause 15,970 home fires per year in the US. If your dryer stopped heating, consider it a warning signal. Before running the dryer again after repair, make sure the full vent system is clean and the exterior vent flap opens freely.
Not sure if you have a gas or electric dryer? Check the plug. Electric dryers have a large, unique 240V plug with 3 or 4 prongs — you can't miss it. Gas dryers use a standard 120V outlet (same as a lamp) but also connect to a gas line. If you see a flexible metal hose running to the dryer from a valve in the wall, it's gas. This matters because the heating components are completely different.
What Our Technicians Test
During a dryer diagnostic, we test every component in the heating circuit:
- Thermal fuse — continuity test with a multimeter
- High-limit thermostat — continuity check
- Cycling thermostat — continuity at room temperature
- Heating element (electric) or igniter (gas) — visual inspection + continuity
- Gas valve solenoids (gas dryers) — tested if the igniter glows but gas doesn't flow
- Exhaust vent — airflow test from inside the dryer to the exterior wall
Our $109 diagnostic covers the full inspection. If you proceed with repair, that fee is applied to the total.
Dryer Not Heating? Get It Fixed Today.
Same-day appointments. $109 diagnostic applied toward repair. Serving all of the Treasure Coast.
📞 Call (772) 353-5791