Dryer Not Heating? 7 Things to Check Before Calling a Sudbury Technician

Your dryer runs but the clothes come out cold and damp. The drum spins, the timer counts down, but no heat. It is one of the most common appliance-repair calls we get in Greater Sudbury, and surprisingly often the fix is something you can handle yourself. Before you book a service call for a dryer not heating in Sudbury, work through these 7 checks in order. About 4 in 10 of these calls turn out to be a clogged vent or a tripped thermostat the homeowner could have cleared in 15 minutes. Worth ruling out before paying the service-call fee.

Check 1: Confirm it is actually a heat issue, not a vent issue

Before chasing heating components, rule out the most common false diagnosis. A lot of dryer not heating complaints in Sudbury are actually airflow issues. The element heats fine, but a blocked vent traps moisture in the drum so clothes come out damp even after a 90-minute cycle.

Quick test: run the dryer empty for 5 minutes on high heat. Open the door. If the inside of the drum feels hot to the touch, the heating element is working and you have a venting problem. Skip to Check 2.

If the drum feels barely warm or cold, the element or its control circuit is the issue. Continue through Checks 3 to 7 in order.

Check 2: Clean the lint trap AND the full vent line

This is the cause we find most often, by a wide margin.

Surface-clean the lint trap, then water-test it. Hold the screen under a tap. If water pools instead of running through, detergent and dryer-sheet residue have clogged the mesh in a way that looks clean but blocks 60 to 80 percent of airflow. Scrub with dish soap and a stiff brush, rinse, and let it dry before reusing.

Then check the full vent run. Unplug the dryer (electric) or shut off the gas valve. Pull the dryer 12 to 18 inches from the wall, disconnect the foil duct at the back, and look inside. Compressed lint means the line is overdue for a cleanout.

Most Sudbury homes need a full vent cleanout every 12 to 18 months. Older homes in Donovan, the Flour Mill, and parts of New Sudbury often have basement laundry venting up two storeys with two or three 90-degree bends. Those homes can need it every 8 to 12 months.

A dryer vent cleaning kit from any Sudbury hardware store runs about $25 and gets you most of the way there. If the buildup is bad enough that the brush meets resistance halfway up the run, call us. We carry a powered rotary brush rig that pulls compacted lint that hand kits cannot.

Check 3: Gas dryer, verify the gas supply

Skip this if you have an electric dryer.

For gas dryers, the most common no-heat cause after a clogged vent is a closed or partially-closed gas valve. The shutoff is usually behind the dryer on a flexible yellow line. Handle parallel to the line means open. Perpendicular means closed.

If the valve is open and other gas appliances in your home (stove, hot water tank, furnace) are working normally, you have gas pressure. The issue is downstream: likely the dryer's igniter or gas valve solenoid. Both need a technician.

Do not attempt to test or replace gas valve solenoids yourself. A gas valve that fails open is a serious hazard. Call us, or call a licensed gas fitter.

Check 4: Electric dryer, confirm both 120V legs at the panel

Skip this if you have a gas dryer.

Electric dryers run on 240V split-phase power. The drum motor only needs 120V to spin, but the heating element needs both 120V legs to fire. If one leg of your breaker has tripped or one fuse has blown, the dryer will run but never heat. This is the second-most-common no-heat cause we see in Sudbury, especially in older homes still on the original cartridge fuses.

Open your breaker panel. Find the dryer breaker (usually a double-pole 30-amp). Flip it fully off, then back on. A breaker that tripped halfway reads as on visually but is electrically open on one leg.

If you still have fuses, both fuses on the dryer circuit need to be intact. Replace any blackened or sagging cartridge fuses as a pair, never one at a time.

If the breaker keeps tripping right after a reset, stop. That points to a heating-element short or a wiring fault. Both need a technician and both can damage the dryer further if you keep cycling power.

Check 5: Confirm the cycle setting

Air Dry, Fluff, or No Heat is a real setting on every modern dryer and the easiest mistake to miss. Some dryers default to it after a power blip. Some have a child-lock setup that pins it.

Run a normal cycle on Cotton or High Heat. Avoid Air Dry, Fluff, Time Dry without heat, or Sanitize+Cool until you confirm everything else works.

If the cycle indicator says Cool Down for most of the timer count, your problem is the cycle selection, not the dryer.

Check 6: Listen for the heating element click

This is a working-tradesperson trick that takes 30 seconds.

Open the dryer, throw in a damp towel, set Cotton or High Heat, hit start. Stand close.

Within 30 seconds you should hear a faint click as the cycle relay closes. A low hum follows as the element starts pulling current. Warm air at the lint trap opening within 90 seconds confirms the element is firing.

No click, no hum, no warmth: the element is dead, the cycling thermostat is dead, or the timer/control board is not signalling. All technician territory.

Click but no warmth: the element coil is open. Replacement is a 30-minute job for a tech, $200 to $350 total in Sudbury per our 2026 cost guide.

Check 7: The high-limit thermostat reset

This one fixes a small but real percentage of dryer-not-heating cases, and almost no homeowner knows about it.

Most dryers have a high-limit thermostat mounted on the heater housing. Its job is to cut power to the element if the dryer overheats, usually because of a blocked vent. After it trips, the dryer runs but never heats. Some thermostats reset themselves once the unit cools. Most do not, and the thermostat needs to be replaced.

If Checks 1 and 2 found a clogged vent and you cleared it, but the dryer still runs cold: there is a strong chance the high-limit thermostat tripped during the overheating event and stayed open. This is a $40 part and a 20-minute repair for a technician.

Worth asking on the call: "I cleared the vent first. Did the high-limit thermostat trip too?" Saves diagnostic time and the tech can bring the part on the first visit.

When you definitely need a technician

Stop DIY and call us if any of these are true.

Your gas dryer has gas pressure but the burner never ignites. Igniter or gas valve solenoid failure. Not safe to diagnose at home.

Your electric breaker keeps tripping when you start the dryer. Heating-element short or wiring fault. Each retry is a fresh fault current pulse on your panel.

You smell burning, ozone, or anything that is not lint. Stop and unplug. Call before running another cycle.

The drum makes a loud screech, grind, or thump during the cycle. Failed bearing or idler pulley. Often paired with no-heat because the same belt drives the blower wheel that moves air past the element.

You see scorching on the back panel near the heater housing. Element-arc damage. Call us, do not power it on.

Your dryer is over 12 years old and a $300 plus repair is in front of you. The repair vs replace math usually favours replacement at that age, especially on entry-level units that are now $700 to $900 new on sale.

Most dryer-not-heating fixes take 1 to 2 hours on-site once we are there. If parts have to be ordered (especially for premium or older brands), expect a 3 to 7 day window. Our Sudbury repair-time guide covers the brand-by-brand windows in detail.

Why Sudbury homes are harder on dryer vents than average

Three local factors make Greater Sudbury homes harder on dryer vents than the Ontario average.

Hard water in the laundry feed. Sudbury water is mineral-heavy. Towels and bedding hold detergent residue longer, which means more lint per load and faster vent line buildup. Our hard water guide covers the broader appliance impact.

Long vent runs in older neighborhoods. A lot of Sudbury housing stock from the 1950s to 70s in New Sudbury, the Flour Mill, and the West End has basement laundry venting up two storeys to a side-wall termination. The extra distance and the extra elbows trap lint faster than a short single-storey run.

Cold-side termination icing. January and February in Sudbury, the warm moist exhaust hits a cold cap or hood, condenses, and freezes a partial seal that traps lint until it thaws. By March a full season of lint can be packed at the termination point.

If you have never had your vent line professionally cleaned, that is the single highest-leverage fix here. Book a washer-dryer service visit and we will do the full clean-out as part of the appointment.

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