The drum turns, the timer counts down and the dryer sounds normal, but the clothes come out just as cold and wet as they went in. A dryer that runs without heat is the most common dryer complaint we hear in Calgary, and it is also one of the most fixable. Nine times out of ten, a single part or a simple supply problem is behind it.
Before you book anything, a few safe checks can either solve the problem outright or tell you exactly what kind of repair you are looking at. This guide walks through them in the order we would, then explains which parts usually fail on electric and gas dryers.
Why a dryer tumbles but won't heat
A dryer has two separate jobs: spinning the drum and making heat. The motor, belt and blower handle the first. The heat source handles the second, and it is protected by a chain of safety parts. Because the two systems are separate, one can fail completely while the other keeps working. That is why the drum can turn perfectly while the heat is gone.
Power and supply problems
Electric dryers need a full 240-volt supply for the heating element, but the motor only uses half of it. Gas dryers need both electricity and an open gas supply. If any part of the supply is missing, you get tumbling with no heat.
Safety devices that have tripped
Thermal fuses, high-limit thermostats and thermal cut-offs all cut the heat when the dryer gets too hot. Once they open, the heat stays off. Most of the time, they trip because air cannot get out of the dryer fast enough.
Worn heating parts
Heating elements, igniters and gas valve coils simply wear out. Age, heavy use and repeated overheating all shorten their life.
Safe checks before you call
Unplug the dryer, or switch off its breaker, before you touch anything behind or inside it. On a gas dryer, never loosen fittings, open the burner area or take apart any gas parts. If you smell gas at any time, leave the house and call ATCO Gas emergency at 1-800-511-3447 from outside.
Check the breaker on electric dryers
Electric dryers use a double breaker in the panel. If only one half trips, the drum keeps turning and the element gets nothing. A half-tripped breaker can look almost normal, so do not trust a quick glance.
- Find the dryer's double breaker in the panel.
- Switch it firmly to off, wait a few seconds, then switch it firmly back on.
- Run a heated cycle for five minutes and feel for warm air in the drum.
Some dryers will tell you about this. On LG dryers, nP means no current is reaching the heater, usually from a tripped breaker leg or an outlet problem. On many Whirlpool-built dryers, L2 or F4 E4 points to low or no line voltage to the heater. You can look up other brands on our LG code list or the main error code page.
Check the gas valve on gas dryers
Behind every gas dryer is a shut-off valve on the supply line. It is easy to bump when the dryer is moved for cleaning or flooring work. The handle should sit in line with the pipe when it is open. Also check that the flexible connector is not kinked against the wall. If both look fine, leave the gas side alone and move on.
Check the airflow
This step is the one most people skip, and it matters most. Clean the lint screen, and wash it in warm soapy water if water beads on it from dryer-sheet film. Then go outside while the dryer runs. The vent flap should open, and you should feel a strong stream of air. In winter, frost and snow at the hood are common culprits around Calgary. If the airflow is weak, the vent needs cleaning before anything else is replaced.
Electric dryer parts that fail
If the breaker is fine and the vent is clear, a part inside the dryer has usually failed. On electric models, these are the usual suspects.
| Part | What it does | Typical sign of failure |
|---|---|---|
| Thermal fuse | One-time cut-off if exhaust overheats | No heat at all; may stop the whole dryer on some models |
| Heating element | Coil that makes the heat | No heat, or heat on low settings only |
| High-limit thermostat | Cuts heat if it gets too hot | No heat after an overheating event |
| Cycling thermostat | Holds the set temperature | No heat, or heat that stays on too long |
| Thermistor | Temperature sensor on electronic models | No heat with an error code |
A broken element is common on dryers that have run with a clogged vent for months. Our post on signs of a failing heating element explains what technicians look for. Some brands will flag it: on Electrolux dryers, E64 means the heater circuit is open, and on many Frigidaire models E5B means the temperature is not rising. For the full repair, see our electric dryer repair service.
Gas dryer parts that fail
Gas dryers make heat with a burner, so the parts are different. The good news is that you can often learn a lot just by watching through the small burner window at the front bottom of the dryer, without opening anything.
- Igniter: it should glow bright orange within a minute of starting a heated cycle. No glow usually means a cracked igniter or an open safety part upstream.
- Gas valve coils: if the igniter glows, then goes dark, and no flame appears, the coils that open the valve are a likely cause. Our post on a gas igniter that glows but won't light covers this pattern.
- Flame sensor: it tells the valve when to open. If it fails, the igniter may glow and never hand off to the flame, or the flame may light and go out.
All of these need testing with a meter and, in the case of the valve, work near the gas supply. That is a job for our gas dryer repair technicians, not a weekend project.
Why fixing airflow comes first
When a thermal fuse or high-limit thermostat fails, it is tempting to swap the part and call it done. The trouble is that these parts rarely fail on their own. They trip because the exhaust got too hot, and the exhaust gets too hot because lint is packed in the duct, the hose behind the dryer is crushed, or the hood outside is blocked.
Replace the fuse without fixing the airflow, and it can blow again within weeks. We explain the cycle in more detail in our post on a thermal fuse that keeps blowing. If the vent run is long or goes through the roof, a full dryer vent cleaning is often the real fix.
Never bypass a thermal fuse or high-limit thermostat to get heat back, even for one load. Those parts are what stop a lint fire from starting.
When to call a technician
If the breaker has been reset, the gas valve is open and the airflow is strong, but the dryer still runs cold, a part has failed inside the cabinet. Testing it means removing panels, working around live wiring and, on gas models, the burner assembly. That is the point to book a dryer not heating repair.
When you call, have the brand, the model number from the sticker inside the door and any error code ready. That lets us bring the most likely parts and fix most no-heat problems on the first visit. Fast Appliance Repair offers same-day service across Calgary, Airdrie and Cochrane, with a flat diagnostic fee and a full quote before we start. Call (587) 779-6919, and know that every repair is backed by our 90-day parts and labour warranty.