Quick Answer
- #1 cause: Clogged dryer vent — clean it first before anything else
- #2 cause: Blown thermal fuse — dryer tumbles but zero heat
- #3 cause (electric): Failed heating element — no heat or heat then cold
- #4 cause (gas): Gas valve solenoids — igniter glows but no flame
- Repair costs: $100–$350 all-in, $89 diagnostic
Gas vs Electric Dryers: Why It Matters
Before troubleshooting, confirm whether you have a gas or electric dryer. Check the back of the unit: an electric dryer plugs into a large 240V outlet (3–4 prong), while a gas dryer uses a standard 120V outlet plus a gas line. The fuel type determines which components can fail.
Electric Dryers
- 240V heating element coil (nichrome wire)
- Drum spins on 120V; heat requires full 240V
- Common failures: element burnout, blown thermal fuse, tripped breaker
- Safer to work on — no gas risk
Gas Dryers
- Gas burner with igniter and valve solenoids
- Requires open gas supply valve + 120V electrical
- Common failures: weak igniter, faulty gas valve solenoids, blown thermal fuse
- Gas components: certified technician only
Top 7 Causes of a Dryer Not Heating
1 Clogged Dryer Vent DIY
A clogged vent is the single most common cause — and the most dangerous. When lint blocks the exhaust duct, hot air cannot escape. The dryer overheats and the thermal fuse or high-limit thermostat trips, cutting heat while the drum keeps spinning.
Symptoms: Clothes take 2–3 cycles to dry; dryer is hot to the touch; laundry room feels humid; exterior vent flap barely opens.
Fix: Disconnect the vent hose from the back. Use a dryer vent brush kit ($20–$40 at hardware stores) to clean the full duct length to the exterior hood. Confirm the outside flap opens freely. Replace flexible foil or vinyl hose with rigid aluminum duct — required by most Canadian building codes and drastically reduces lint buildup.
Fire safety: Dryer vent clogs cause an estimated 15,000 house fires per year in North America. Clean your vent at least once a year — every 6 months if you do 5+ loads/week or have pets.
2 Blown Thermal Fuse Maybe DIY
The thermal fuse is a one-time safety device. When it blows (almost always due to a clogged vent), the dryer tumbles with zero heat. It cannot be reset — it must be replaced.
Symptoms: Dryer runs but produces no heat whatsoever; problem appeared suddenly. On some Samsung and LG models a blown fuse prevents the dryer from starting at all.
Location by brand: Whirlpool/Maytag/Kenmore — behind rear panel on exhaust duct. Samsung/LG — on heating element housing (front lower or rear panel). GE — near burner (gas) or heating element (electric).
Test and replace: Disconnect power. Remove the fuse (two terminals) and test with a multimeter for continuity. No continuity = blown. The fuse costs $8–$20. Always clean the full vent duct before installing a new fuse or it will blow again within weeks.
3 Failed Heating Element (Electric) Professional
The heating element is a nichrome wire coil inside a metal housing. Over years of use the coil breaks or grounds against the housing. When it fails, the drum spins but no heat is produced (or heat appears briefly then stops).
Symptoms: No heat or heat that quickly disappears; visible scorch marks or breaks in the element coil; if grounded, the dryer may trip the circuit breaker.
Diagnosis & fix: Inspect the coil visually for breaks. Test with a multimeter — no continuity means a failed element. The part costs $20–$89, but replacement requires internal disassembly. We recommend a certified technician for this repair.
4 Gas Valve Solenoid Failure (Gas) Professional
Gas dryers use two or three solenoid coils to open the gas valve when the igniter reaches temperature. When solenoids weaken, the dryer heats at the start of the cycle then stops partway through.
Symptoms: Igniter glows but gas never ignites (or ignites briefly and stops); clothes are still damp at the end of a full cycle; problem worsens gradually.
Fix: Solenoid replacement by a certified technician. Parts are $15–$30 but this is a gas component repair. If you smell gas at any point, shut the gas valve, open windows, and call your gas company immediately.
5 Igniter Failure (Gas) Professional
The silicon carbide igniter glows white-hot to light the gas burner. After thousands of cycles it cracks or weakens and can no longer reach the temperature needed to open the gas valve.
Symptoms: Igniter does not glow at all; igniter glows dim orange (too weak to trigger valve); no heat and no gas smell. With the dryer running, look through the opening near the burner — the igniter should glow bright orange/white within 60–90 seconds.
Fix: Igniter replacement by a certified technician. The part costs $25–$50. The igniter is fragile and shatters easily — professional handling is strongly recommended.
6 Cycling Thermostat Failure Professional
The cycling thermostat cycles the heater on and off to maintain drum temperature. If stuck open, the heater never activates. If stuck closed, the dryer overheats and the thermal fuse blows.
Symptoms: No heat (stuck open); clothes come out scorched or extremely hot (stuck closed); inconsistent temperatures from load to load.
Fix: Test with a multimeter — should show continuity at room temperature. Part costs $10–$25. A certified technician can replace it in under an hour.
7 Control Board Failure Professional
The electronic control board manages the heating circuit via a relay. If that relay fails, the dryer runs normally but produces no heat. This is the least common cause — always rule out the above six issues first.
Symptoms: No heat despite all other components testing normal; error codes on display; erratic dryer behaviour (random cycle changes, display flickering).
Fix: Board replacement costs $150–$350 for the part alone. On a dryer older than 10 years, replacement of the whole unit may be the smarter financial choice.
Before Calling a Technician, Try These:
Repair vs Replace: When to Call It
Repair Makes Sense When:
- Dryer is less than 10 years old
- Repair cost is under 50% of a new unit
- Problem is a wear item (fuse, element, igniter, solenoids)
- Dryer has been reliable with no recurring issues
Replace Makes Sense When:
- Dryer is over 12–15 years old
- Repair cost exceeds 50% of a new unit
- Multiple components have failed in the past year
- Control board failure on a unit older than 10 years
Dryer Repair Cost Breakdown (Toronto & GTA)
| Issue | DIY Possible? | Pro Repair Cost |
|---|---|---|
| Clogged vent cleaning | Yes — $0–$50 | $80 – $150 |
| Thermal fuse replacement | Maybe | $100 – $200 |
| Heating element (electric) | No | $150 – $280 |
| Gas valve solenoids | No | $150 – $300 |
| Igniter (gas) | No | $150 – $280 |
| Cycling thermostat | No | $100 – $200 |
| Control board | No | $200 – $350 |
All prices include parts and labour. Nick's Appliance Repair charges a $89 diagnostic fee.
Limited-time offer: We are currently offering $40 OFF any repair. Book online or call (437) 747-6737 to claim this discount.
Dryer Not Heating by Brand
Samsung Dryer Not Heating
Most common cause: blown thermal fuse (part DC96-00887A or DC47-00016A) on the heating element housing. Samsung electric dryers are also prone to element failure after 5–8 years. Check for error codes first — HE (heating error) or dE (door error) point to the cause quickly.
LG Dryer Not Heating
LG dryers frequently fail due to a thermistor (temperature sensor) sending incorrect readings to the control board. LG's FlowSense feature flags restricted airflow — if you see d80, d90, or d95 error codes, your vent is 80–95% blocked and must be cleaned before any other diagnosis.
Whirlpool and Maytag Dryer Not Heating
Very repairable. Most common causes: blown thermal fuse (part 279973), failed heating element (part 279838), or faulty high-limit thermostat. Parts are widely available and affordable. These dryers typically last 12–15 years with proper vent maintenance.
GE Dryer Not Heating
GE electric dryers most often have heating element failures; GE gas dryers commonly have igniter issues. A GE-specific issue is a failed radiant flame sensor on gas models — it prevents the gas valve from opening even when the igniter is working correctly.
Frequently Asked Questions
The most common causes are a clogged vent, blown thermal fuse, or failed heating element (electric) or igniter (gas). Start by checking your breaker panel and cleaning the lint trap and vent duct. If the drum spins but there is no warmth at all, the thermal fuse is the most likely culprit. For electric dryers, also confirm both legs of the 240V circuit are live — the motor runs on 120V but the heater needs 240V.
Most dryer heating repairs cost $100–$350 including parts and labour. A thermal fuse replacement is the cheapest at $100–$200 all-in; a control board can run $200–$350. Nick's Appliance Repair charges a $89 diagnostic fee, plus we are currently offering $40 OFF any repair.
Yes — it is the number one cause. A blocked vent causes the dryer to overheat and trip the thermal fuse. Once the fuse blows, the drum keeps spinning but there is zero heat. Clean the vent and replace the fuse and the problem is usually resolved completely.
Most dryers last 10–15 years. Under 10 years old and the repair is under 50% of a new unit cost — repair is usually the better value. Control board failure on a unit older than 10–12 years is typically the point where replacement makes more sense financially.
Partial heat usually points to a partially clogged vent, a failing cycling thermostat, or a weakening heating element. In gas dryers, worn gas valve solenoids cause intermittent heating where the burner lights initially but shuts off before the cycle completes. Start by cleaning the vent — this resolves the problem in most cases.
A thermal fuse permanently blows when the dryer overheats — it must be replaced. A high-limit thermostat is resettable and trips temporarily at high temperatures, then resets when the dryer cools. If heating cuts off suddenly and completely, suspect the thermal fuse. If heat cuts in and out repeatedly, the high-limit thermostat may be tripping due to poor airflow.