Dryer Not Heating — Troubleshooting Guide
Fix a dryer that runs but doesn't heat. Check the lint trap, vent, thermal fuse, and heating element.
Time Estimate
⏱️ 30 minutes - 1 hour
DIY Cost
💰 $20-100 DIY / $150-350 repair
Tools Needed
🧰 Screwdriver, Multimeter, Vacuum
The dryer runs, the drum spins, but clothes come out damp. If there’s no heat, here’s where to look.
Check #1: Lint Trap and Vent (Do This First)
A clogged vent is the #1 cause of dryers not heating — and a fire hazard.
Check the lint trap: Clean it before every load. If it’s coated, air can’t flow.
Check the vent:
- Go outside and find the vent hood
- Run the dryer and feel for strong airflow
- Weak airflow = clogged vent
The Fix:
- Disconnect the vent hose from the back of the dryer
- Vacuum the hose and the duct to the outside
- Use a vent brush for long runs
- Remove any lint buildup at the exterior hood
Time: 30 minutes. Cost: $20-30 for a vent brush kit.
Do this annually to prevent fires and maintain heating.
Check #2: Thermal Fuse
The thermal fuse blows when the dryer overheats (usually from poor venting). Once blown, no heat.
Location: Usually on the exhaust duct or blower housing inside the dryer.
Test: Use a multimeter to check continuity. No continuity = blown fuse.
The Fix: Replace the fuse ($10-25). But also fix the underlying cause (usually the clogged vent) or it will blow again.
Check #3: Heating Element (Electric Dryers)
Electric dryers use a coil to generate heat. It can break over time.
Signs:
- No heat at all
- Element visibly broken when inspected
Test: Check continuity with a multimeter.
The Fix: Element replacement ($30-100 part). Moderate DIY — requires opening the dryer cabinet.
Check #4: Gas Igniter (Gas Dryers)
Gas dryers use an igniter to light the gas. If it fails, no flame, no heat.
Signs:
- You hear the gas valve click but no heat
- Burner doesn’t glow/ignite
The Fix: Igniter replacement ($40-80). Because it involves gas, many prefer professional service.
Check #5: Flame Sensor/Gas Valve Coils (Gas Dryers)
The flame sensor and gas valve coils work together to control gas flow. These can fail intermittently — dryer heats sometimes but not others.
Fix: Coil set replacement ($20-40). Professional recommended due to gas.
When to Call a Pro
- Gas dryer issues (safety)
- You’re not comfortable with electrical testing
- Problem persists after checking vent and fuse
- Unusual sounds or burning smells
Cost: $150-350 for most heating repairs.
The Bottom Line
Clean the vent first — it’s the most common cause and a safety issue. Check the thermal fuse second. Beyond that, you’re looking at element or gas system repairs, which are moderate DIY or a service call.