An electric dryer that runs but won't heat is almost always one of three things — a blown thermal fuse, a failed heating element, or a tripped high-limit thermostat. About four in ten no-heat calls trace back to a blocked vent that made one of those three trip in the first place. Clean the vent first, always.

Two different faults — make sure you're diagnosing the right one

Before you open anything, confirm the symptom. An electric dryer that runs and tumbles but stays completely cold is a no-heat fault — heating element, thermal fuse, or thermostat. A dryer that gets hot but takes multiple cycles to dry a load is a different problem: restricted airflow caused by a blocked vent. Those two symptoms can look similar on the laundry-room floor but they're solved by different repairs.

Safety callout — lint fires. If your dryer runs hot and produces heat but clothes stay damp after a full cycle, stop using it and clean the vent immediately. Lint build-up in the vent line is the most common cause of dryer fires in Ontario. Anything more than a thin coating on the vent hose is too much — replace it. Rigid aluminum or semi-rigid ducting is safer than the white plastic flex hose many older installs used; if yours is still plastic, swap it while you're in there.

How an electric dryer makes heat

Electric dryers use a nichrome heating element — a coiled resistance wire that glows red when current flows through it. The element is protected by a thermal fuse (a one-shot safety) and a high-limit thermostat (resettable). The motor blows air across the hot coil and into the drum; a separate cycling thermostat cuts the element on and off to hold temperature. Most no-heat calls come back to one of those four parts: the element, the fuse, the high-limit, or the cycling thermostat.

On newer electronic-control dryers, a control-board relay switches the heating element on and off, which adds one more failure point. On mechanical-timer dryers the timer itself can stop advancing the heat cycle. Both are rare compared to a blown thermal fuse.

Gas dryers — not in our scope

Appliances City Wide services electric appliances only. If you have a gas dryer, you'll need a technician with the appropriate Ontario gas-appliance credentials — call 416-436-3182 and we'll recommend one we trust. If you smell gas at any point during diagnosis — even a faint sulphur note — stop, ventilate the room, and call a technician. Never replace gas-side parts yourself.

Diagnose your dryer in five steps

The steps are captured in the howto_steps block above and render as the numbered list in the page body. Work them in order — step 3 (vent cleaning) resolves a large share of no-heat calls before you ever need to open the back panel, and skipping it means any new thermal fuse will blow again within a few cycles.

The five parts that fail most often

1. Thermal fuse. The single most common failed part on a no-heat call. A one-shot safety device that trips permanently when the dryer overheats, usually because of a restricted vent. Replacement is a cheap part and a 30-minute back-panel job. Always clean the vent first — if you don't, the new fuse trips again within a cycle or two.

2. Heating element. The nichrome coil burns through after several years of thermal cycling. You can often see the break by eye when you pull the element housing. Replacement is an intermediate-DIY job; match the part number from the data plate before ordering.

3. High-limit thermostat. Located on the heater housing. Fails less often than the thermal fuse but failures present identically — dryer tumbles, stays cold. Continuity-tested the same way.

4. Timer or control board. On older dryers, a mechanical timer that won't advance to heat. On newer units, a control-board fault that won't send voltage to the heater relay. Diagnose by elimination after ruling out the cheaper parts.

5. Heater relay (electronic controls). On newer electronic dryers, a separate relay on the control board switches the heating element on and off. When the relay fails, the element stays cold even with all the safety components intact.

Can you fix this yourself?

Basic DIY (no training): vent cleaning is universal. Anyone can do it and everyone should, at least once a year. This is the single most impactful dryer maintenance task you can perform.

Intermediate DIY (multimeter + screwdriver): thermal-fuse swap and heating-element swap are within reach if you unplug the unit, match the part number to the data plate, and test continuity before replacing. Expect 45 minutes start to finish for the fuse, 90 minutes for the element.

Technician work: control board diagnosis, heater relay replacement, and any job that requires disassembling the drum or the motor. These are safer left to someone who does this every week.

Repair or replace? Use this checklist.

  • 50% rule: if the repair estimate exceeds half the cost of a comparable new dryer, lean replace.
  • Age threshold: 13-year average useful life for dryers. Past that, lean replace even on moderate repairs.
  • Cheap fixes almost always worth it: a thermal-fuse replacement plus vent cleaning is one of the more budget-friendly repairs and will keep most dryers running for years. Worth doing on any unit under 15 years.
  • Expensive fixes on older units: drum bearings, drum rollers, or motor on a 10-plus-year dryer often cross the 50% line — compare to replacement before approving.
  • Safety override: scorch marks around the heater housing, melted wiring insulation, or evidence of past vent fires → stop-use and call a technician.

Local note — the GTA

Older homes across Toronto, East York, and parts of Etobicoke and Scarborough were built with long vent runs — dryer in the basement, vent travelling 15 or 20 feet through finished ceilings before exiting the house. Long runs collect lint faster than short runs and are harder to clean without professional equipment. If you have a long vent run, budget for a professional vent cleaning every year or two — it's the cheapest dryer insurance you can buy.

Appliances City Wide services the 22 GTA cities — usually same-day or next-day for dryer calls. See the Toronto service area page for neighbourhoods served and per-zone response time.

Still not sure? Talk to a specialist.

Tell us the brand of your dryer, what the symptom is, and when you last cleaned the vent. Call 416-436-3182, start a chat, or email info@appliancescitywide.com.

Frequently asked questions

Why is my electric dryer running but not getting hot?

The most common cause is a blown thermal fuse — a one-shot safety device that trips when the dryer overheats, usually because of a blocked vent. After that: a failed heating element, a tripped high-limit thermostat, or the timer / control board. Clean the vent line before anything else — a blocked vent is the root cause of the thermal-fuse trip in about 40 percent of no-heat calls.

Can a blocked dryer vent cause the dryer to stop heating?

Yes — and it's the single most common cause. When the vent is blocked, hot air can't escape, the internal temperature climbs past the safety limit, and the thermal fuse pops to prevent a fire. After that, the dryer will tumble but stay cold until the fuse is replaced and the vent is cleared. If you don't fix the vent first, the new fuse will pop too. Any time you see lint falling from inside the dryer or clothes coming out damp after a full cycle, stop and clean the vent — that's a lint-fire risk.

How much does a heating element cost?

Heating element prices vary by brand, and the full service call — diagnosis, replacement, and our 1-year warranty on parts and labour — is quoted up front before any work begins. Heating elements are stocked on the truck for major brands, so it's almost always a single-visit repair.

Do you service gas dryers?

No — Appliances City Wide services electric appliances only. For a gas dryer you'll need a technician with the appropriate Ontario gas-appliance credentials. Call 416-436-3182 and we'll point you to a licensed gas technician we trust. If you smell gas at any point, shut off the supply, ventilate the space, and call a technician before doing anything else.