A dryer that runs but doesn't heat is one of the most common appliance problems we get called out for at TrueFix Appliance Repair across Toronto and the GTA. The good news: in many cases, the cause is simple and fixable. The bad news: if you ignore it, a dryer that's struggling to heat is also one of the most common causes of household fires in Canada.
According to Toronto Fire Services, there are around 39 dryer fires in the city every year — most caused by lint buildup and poor maintenance. So when your dryer stops heating, it's worth fixing fast.
Here are the five most common reasons your Toronto dryer is running without heat, how to diagnose each one, and when to call a professional.
- Unplug the dryer or shut off the breaker before opening any panels
- For gas dryers, also turn off the gas supply valve
- Never bypass safety components like thermal fuses
- If you smell gas or burning, stop immediately and call a professional
1. Clogged Lint Trap or Vent (The #1 Cause)
By far, the most common reason a dryer runs but won't heat is restricted airflow. When lint builds up in the trap, vent hose, or exterior vent cap, hot air can't escape. The dryer overheats internally, triggers a safety shutoff, and stops producing heat — even though the drum keeps spinning.
- Clothes take two or more cycles to dry
- The dryer feels unusually hot to the touch
- Outside vent cap doesn't open or has weak airflow
- A burning smell during use
How to check it
- Pull out the lint trap and clean it thoroughly — soak it in hot soapy water if there's a waxy film from dryer sheets
- Unplug the dryer and disconnect the vent hose from the back
- Shake out the hose and vacuum any visible lint buildup
- Go outside and check the vent cap on your home's exterior — make sure the flap opens freely and isn't blocked by lint, leaves, or even bird nests
DIY fix: Clean every accessible part of the vent system. If your vent hose is the flexible accordion-style plastic kind, replace it with rigid metal ducting — it's safer and lint doesn't trap as easily.
When to call TrueFix: If you've cleaned everything visible but airflow is still weak, lint may be packed deep inside the wall ducting. We provide professional vent cleaning across Toronto and the GTA. Toronto households should clean their vents at least once a year — every 6 months if you do heavy laundry.
2. Blown Thermal Fuse
If your vent has been clogged for a while, there's a good chance the thermal fuse has already blown. This small safety device cuts power to the heating circuit when the dryer overheats. Once it blows, it doesn't reset — it must be replaced.
- The drum spins normally, the cycle completes, but there's zero heat
- This problem started suddenly (not gradually)
- You've noticed the dryer running hotter than usual recently
How to check it
Testing the thermal fuse requires a multimeter and partial disassembly of the dryer. Most homeowners don't have the tools or experience for this — and it's not the kind of repair you want to guess at.
Repair cost: Thermal fuse replacement in the Toronto area typically runs $90 to $180 including labour. The part itself is cheap (under $20), but accessing it requires opening the dryer.
Important: Just replacing the fuse isn't enough. If the underlying airflow problem isn't fixed, the new fuse will blow again within weeks. A proper repair always includes a full vent inspection.
3. Faulty Heating Element (Electric Dryers)
For electric dryers, the heating element is what produces heat. It's a coil of wire that glows hot when electricity passes through it. Over time — usually 8 to 12 years of use — these coils break down and stop working.
- The dryer is older (typically 8+ years)
- No heat at all, even on the hottest setting
- You may see a small burned spot or visible break if you inspect the element
- Vent and lint trap are already clean
Repair cost: Heating element replacement in Toronto runs $150 to $300 including parts and labour. It's a worthwhile repair if your dryer is under 10 years old.
Note for gas dryers: Gas dryers don't have a heating element. They use an igniter and burner assembly instead, which can also fail. Gas dryer repairs should only be done by a licensed professional — improper work can cause gas leaks or fires.
4. Tripped Breaker or Power Supply Issue
Electric dryers need 240 volts to heat. They get this from two 120-volt circuits in your electrical panel. If only one of those circuits trips, the dryer will still run (because the motor only needs 120V) but the heating element won't get power.
This is a sneaky one — most homeowners assume that if the dryer turns on, the power must be fine. Not always.
- The dryer suddenly stopped heating with no warning
- Recent electrical work was done in your home
- The breaker for the dryer feels loose or shows signs of damage
- This issue started after a power outage
How to check it
- Find your electrical panel and locate the dryer breaker (it's a double breaker — two switches connected together)
- Flip both switches fully off, then fully on
- Run a heat cycle and see if the problem is resolved
When to call TrueFix or an electrician: If the breaker keeps tripping, do not keep resetting it. That's a sign of a deeper electrical problem. Also: testing for proper voltage at the dryer outlet requires a multimeter and electrical knowledge — leave that to a pro.
5. Faulty Thermostat or High-Limit Switch
Your dryer has multiple thermostats and temperature sensors that work together to control heat. If any of them fail, the heating element won't activate properly.
- Lint and vent are clean
- Power supply is confirmed working
- Heating element looks intact
- Dryer is between 5 and 12 years old
Repair cost: Thermostat replacement runs $120 to $220 in the Toronto area, depending on which thermostat needs replacing and how accessible it is.
This is one of the harder issues to diagnose without proper tools. If you've ruled out the simpler causes above, it's time to call a technician.
When to Call a Professional Dryer Repair Technician
Some dryer fixes are genuinely DIY-friendly. Cleaning the lint trap, replacing a vent hose, resetting a breaker — those are jobs most homeowners can handle. But you should call TrueFix Appliance Repair if:
- You've cleaned the vent and the dryer still won't heat
- Your dryer is gas-powered (always call a professional for gas dryers)
- The breaker keeps tripping
- You smell burning or see scorch marks
- Your dryer is under warranty (DIY repairs can void it)
- You're not comfortable opening the dryer cabinet
A proper diagnosis usually costs less than the cost of replacing a working dryer — and certainly less than the cost of a house fire.
Why Toronto Dryers Need Extra Attention
Toronto's climate creates specific challenges for dryers:
- Long winters mean heavier use — families do more laundry indoors, increasing wear on dryer components
- Older homes in neighbourhoods like the Annex, Leslieville, or High Park often have long, twisting vent runs that trap lint more easily
- Condo and townhouse dryers in newer developments across Mississauga, Vaughan, and North York often share vent stacks, making professional cleaning more important
- Humidity in summer means slightly damp clothes go in the dryer, putting more strain on the heating system
Annual vent cleaning isn't optional in this climate — it's preventative maintenance that saves money, energy, and potentially your home.
TrueFix Service Areas
We provide same-day and next-day dryer repair across the Greater Toronto Area, including:
- Downtown Toronto, North York, Scarborough, Etobicoke
- Mississauga
- Brampton
- Markham
- Richmond Hill
- And surrounding GTA communities
Need help with a dryer that won't heat in Toronto or the GTA?
We've fixed thousands of dryers across Toronto, Mississauga, Brampton, Vaughan, Markham, and Richmond Hill. Same-day appointments often available — Samsung, LG, Whirlpool, Maytag, GE, KitchenAid, Bosch and more.
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