Why Is My Dryer Not Heating?

A dryer that spins but produces no heat turns laundry day into an all-day affair. The good news: most no-heat problems are airflow issues or inexpensive parts — not a dead dryer. Work through these checks in order before calling for service.

Quick diagnosis: what are the symptoms?

• Tumbles, no heat at all, runs full cycle → thermal fuse blown or heating element failed. See Steps 2–3.
• Some heat but clothes take forever → clogged vent or lint buildup restricting airflow. See Step 1.
• No heat on an electric dryer, gas dryer works on some cycles → gas valve coils (gas dryers). See Step 4.
• Dryer will not start at all → different problem (door switch, belt, power). Check the breaker and door switch first.

Safety first

• Unplug the dryer (electric) or turn off the gas supply (gas dryer) before removing any panels.
• Electric dryers run on 240V — a dangerous voltage. If you are not comfortable with a multimeter, stop at Step 1 and call a technician.
• Never run a gas dryer with panels removed.

Step 1: Clear the airflow (fixes most cases)

Restricted airflow is the #1 cause of heating problems — and a fire hazard.

1. Clean the lint filter thoroughly — wash it with soap and water every few months; fabric softener sheets leave an invisible film that blocks airflow (water should flow through it freely).
2. Check the vent hose behind the dryer. Pull the dryer out, disconnect the hose, and look inside — lint packed in the hose chokes the dryer.
3. Clean the exterior vent. Go outside and check the vent cap — lint, bird nests, and crushed louvers block exhaust. The flapper should open freely when the dryer runs.
4. Clean the full vent run. A vent brush kit ($15–$25) on a drill cleans the entire duct. Long vent runs with bends collect astonishing amounts of lint.
5. Run a test load. If heat returns, poor airflow was the problem — and you just prevented a potential dryer fire.

Step 2: Test the thermal fuse

The thermal fuse is a safety device that blows when the dryer overheats (usually because of the blocked vent in Step 1). A blown fuse = no heat.

1. With the dryer unplugged, remove the back panel (electric) to access the fuse — a small white plastic component on the blower housing or element housing.
2. Test with a multimeter set to continuity: no continuity = blown fuse.
3. Replace it ($5–$15). But critically — find and fix what overheated the dryer (Step 1), or the new fuse will blow too.

Step 3: Test the heating element (electric dryers)

If the fuse is good but there is still no heat:

1. Locate the heating element housing (a metal box, usually at the back or bottom).
2. Visually inspect the element coil — a break in the coil wire is often visible.
3. Test continuity with the multimeter across the element terminals. No continuity = failed element.
4. Replace the element ($30–$80 for the part). It is usually held by a few screws and two wire terminals — a very doable DIY repair with the power off.

Also test the high-limit thermostat while you are in there — it is cheap ($10–$15) and commonly replaced alongside the element.

Step 4: Gas dryer specifics

If you have a gas dryer with no heat:

1. Check the gas supply — is the shutoff valve open? (It sounds obvious; it is the cause more often than anyone admits.)
2. Listen for the igniter. When the dryer starts a heated cycle, you should hear clicking and see a glow through the front panel peep-hole. No glow = failed igniter ($20–$40 part).
3. Gas valve coils weaken with age — the classic symptom is heat for the first 10–15 minutes, then no heat for the rest of the cycle. Replacement coil kits are $15–$25 and plug in.
4. Gas work beyond this (valve replacement, gas line issues) belongs to a professional.

What this costs

Mistakes to avoid

• Replacing parts without fixing the vent. A new thermal fuse blows again within weeks if the vent is still clogged. Always clear airflow first.
• Using a vinyl vent hose. Only use rigid or semi-rigid metal duct — vinyl and foil accordion hoses trap lint and are a fire hazard. Many are against code.
• Working on a 240V dryer while plugged in. Unplug it. Every time.
• Ignoring long dry times. “It just takes two cycles now” means restricted airflow — a fire risk, not a quirk. Dryer lint causes thousands of house fires yearly.
• Running the dryer without the lint filter. Never. The filter is the last defense before lint reaches the heating element.

Frequently asked questions

How do I know if my dryer vent is clogged? Clothes take much longer to dry, the dryer feels very hot on top, the laundry room gets humid, and little or no air comes out of the exterior vent while running.

Can I use the dryer with no heat temporarily? Yes — the air-fluff/no-heat cycle works for freshening clothes, but it will not dry a wet load in any reasonable time.

Why does my dryer heat on some cycles but not others? Likely failing gas valve coils (gas dryer) or a thermostat issue. Electric dryers with a partially broken element can also heat weakly on some settings.

How often should I clean the dryer vent? The lint filter every load; the full vent run at least once a year (twice if you do a lot of laundry or have pets).

When to call a pro

• You are not comfortable with 240V electrical work or a multimeter — a technician diagnoses and repairs no-heat issues in one visit ($150–$300).
• The problem is in the gas valve or gas line — licensed professional only.
• The dryer is 10+ years old and needs a major repair — replacement ($600–$1,200) may beat another repair bill.
• You smell gas — leave the area and call your gas utility immediately. Do not troubleshoot.
• Burning smell with no heat — stop using the dryer; could be a failing motor or wiring issue.