What to Do When Your Gas Dryer Is Not Heating Up

What to Do When Your Gas Dryer Is Not Heating Up

Gas Appliance Safety: What You Must Know Before Anything Else

GAS SAFETY - READ THIS FIRST

If you smell gas at any point, stop all troubleshooting immediately:

  • Do NOT turn any electrical switches on or off
  • Do NOT use your phone inside the house
  • Leave the building immediately, leaving the door open
  • Call Enbridge Gas emergency line from outside: 1-866-763-5427
  • Call 911 if you believe there is immediate danger
  • Do not re-enter the building until emergency services clear it

Gas work in Ontario is governed by the Technical Standards and Safety Authority (TSSA). Only licensed gas contractors may perform repairs, adjustments, or work on gas supply lines, gas valves, burner components, or gas connections. Attempting these repairs yourself is illegal and dangerous.

When Your Gas Dryer Runs but Won't Heat

A gas dryer that tumbles but produces no heat is a specific problem with a defined set of causes. Some of them are completely safe for a homeowner to investigate, they involve lint traps, airflow, and electrical connections. Others touch the gas system and must only be handled by a licensed gas technician. This guide is clear about which is which, because the stakes are different. If you still prefer to get professionals to fix your gas appliance, then our technicians can help you out! 

What Homeowners Can Safely Check

1. The Lint Trap and Exhaust Vent

This is always the first thing to check. A completely blocked lint trap or exhaust duct will trip the dryer's thermal fuse - a safety device that cuts off heat when the dryer overheats. The dryer will run and tumble but produce no heat. Clean the lint trap before every load. If it hasn't been cleaned recently, clean it now and run a test load.

Check the entire length of the exhaust duct as well. Disconnect the flexible duct from the back of the dryer (unplug the dryer from electrical power first) and look through it. A duct full of lint buildup reduces airflow to the point where the thermal protection system activates. Rigid metal ductwork performs significantly better than flexible plastic or foil duct, which traps lint at every bend. The outdoor vent cap should open freely when the dryer is running - a stuck flap traps heat and lint inside.

2. The Electrical Connections (Gas Dryers Still Use Electricity)

Gas dryers use natural gas for heat but require a standard 120V electrical connection to operate the motor, controls, and igniter. Check that the dryer is fully plugged into the wall and that the standard 15-amp or 20-amp circuit breaker hasn't tripped. Unlike electric dryers which use massive 240V plugs, gas dryers use a standard household plug. If the breaker trips, the machine will go completely dead, but if the plug is loose, the controls might act erratically.

3. The Gas Valve Is Turned On

Locate the gas shut-off valve on the supply line behind or beside the dryer. It should be fully open - the handle parallel to the pipe, not perpendicular to it. If someone recently serviced nearby plumbing or moved the dryer, the valve may have been closed and not reopened. Verify it's open before concluding there's a gas system failure.

Note: confirming the valve position is a visual check only. You are not opening connections or touching gas fittings. If the valve appears to be open and you're still not getting heat, move to the next step.

4. Check Other Gas Appliances in the Home

If you have other gas appliances - a gas stove, furnace, or water heater - check that they are working. If none of your gas appliances are working, the issue may be with the gas supply to your home (main shut-off, utility outage, or meter issue). Contact Enbridge Gas at 1-866-763-5427 or check the Enbridge Gas website for outage information in your Ottawa or Gatineau area. If other appliances work fine but the dryer doesn't heat, the issue is isolated to the dryer's gas components.

Causes That Require a Licensed Gas Technician

The following components are part of the gas circuit of your dryer. Under Ontario's Technical Standards and Safety Act and the TSSA's Fuels Safety program, work on these components requires a licensed gas technician. Do not attempt to inspect, clean, adjust, or replace these parts yourself.

Gas Valve Assembly

The gas valve assembly controls gas flow to the burner. It has solenoid coils that open and close the valve in response to electrical signals from the dryer's control circuit. When the solenoids fail, gas can't reach the burner and there's no heat. A bad gas valve is one of the most common causes of gas dryer no-heat failures, but diagnosing and replacing it requires disconnecting gas lines and handling gas valve components - licensed gas technician work only.

Igniter

The igniter glows to ignite the gas when the burner lights. When it fails, gas may flow but won't ignite (potentially accumulating, which is why gas safety protocols matter). If you can see the burner area on your dryer model and the igniter glows but the flame doesn't light, the gas valve solenoids may be the issue. If the igniter doesn't glow at all, it may have failed. Igniter replacement itself is a mechanical part, but because it sits in the gas burner assembly, the work overlaps with the gas circuit and must be done by a qualified technician.

Flame Sensor (Radiant Sensor)

The radiant sensor detects whether the burner flame is present and signals the gas valve to stay open or close. A failed flame sensor causes the burner to cycle off quickly, producing intermittent or no heat. Replacement requires working in the burner assembly.

Thermal Fuse

The thermal fuse is a one-time safety device that blows when the dryer overheats, permanently cutting heat until it's replaced. This is typically the result of restricted airflow from lint buildup. While the thermal fuse itself is not a gas component (it's in the electrical circuit), replacing it without first identifying and correcting the airflow restriction that caused the overheat will result in the new fuse blowing again quickly. Diagnosis of why the fuse blew is part of this repair. A technician will inspect the vent system, clean the duct, and replace the fuse in a single visit.

TSSA Regulatory Disclaimer and Emergency Contacts

Disclaimer: This article is for general guidance only. Home Appliance Care is not liable for outcomes from actions taken based on this content. Always confirm with a licensed professional for your specific situation.

Gas appliance work in Ontario is regulated by the Technical Standards and Safety Authority (TSSA). Only TSSA-licensed gas contractors may repair, adjust, or work on gas lines, valves, burner components, or any part of the gas circuit. Unlicensed gas work is illegal under Ontario law and creates serious risk of fire, explosion, or carbon monoxide poisoning.

Emergency contacts:

  • Enbridge Gas emergencies (gas leak/smell): 1-866-763-5427 (24/7)
  • Emergency services: 911
  • TSSA consumer hotline: 1-877-682-8772
  • Enbridge Gas Ottawa area: 1-877-362-7434

Frequently Asked Questions About a Gas Dryer That Won't Heat

Is it safe to run a gas dryer that produces no heat? +

In most cases, running a gas dryer that produces no heat is not immediately dangerous, because the most common cause of no-heat failure is a safety system (thermal fuse or gas valve solenoid) that has already interrupted the gas supply. The dryer tumbles without producing heat - there's no unburned gas accumulating. However, if you can smell gas when the dryer is running, stop immediately, leave the house, and call Enbridge Gas emergency line (1-866-763-5427). Smell of gas near a dryer means the gas circuit may be open but not igniting, which is a serious hazard. Running the dryer in that condition risks accumulating gas in the laundry area. If there's no gas smell and no heat, it's generally safe to postpone repair for a day or two, but get a technician assessment promptly.

My gas dryer heats for the first few minutes then goes cold. What causes that? +

Intermittent heat - where the dryer gets hot initially then cycles off and stays cold - is typically caused by either a failing radiant sensor (flame sensor) or gas valve solenoids that are failing but not completely dead. The radiant sensor detects whether the flame is burning. When it starts failing, it may cut the gas supply prematurely, before the load is dry. The burner won't relight for the remainder of the cycle. A failing solenoid shows a similar pattern: it opens to start the cycle but fails to stay open as it heats up. Both components are gas circuit parts that require a licensed technician for diagnosis and replacement. In the meantime, check the lint trap and exhaust vent - partial vent restriction can also cause the overheat protection system to cut heat partway through a cycle.

How often should a gas dryer exhaust duct be professionally cleaned? +

The National Fire Protection Association recommends dryer exhaust ductwork be inspected and cleaned by a professional annually in single-family homes with regular dryer use. This is especially important for gas dryers, where duct blockages can lead to incomplete combustion and carbon monoxide risks in addition to fire hazard from overheating lint. DIY duct cleaning using a dryer vent cleaning kit (a brush on a flexible rod available at hardware stores) can maintain the duct between professional cleanings for shorter duct runs with few bends. Longer runs, ducts with multiple elbows, or ducts that have never been cleaned should be done by a professional with proper vacuum extraction equipment. Signs that a cleaning is overdue: clothes taking longer than usual to dry, the dryer exterior feeling hot to the touch, and visible lint accumulation around the exterior vent opening.

Can I convert my gas dryer to electric to avoid these gas system issues? +

No - gas dryers and electric dryers use entirely different internal heating systems and are not convertible. A gas dryer has a gas burner, igniter, and flame sensor where an electric dryer has a heating element. The appliances are designed differently and conversion is not feasible. If you want to switch from gas to electric, you need to purchase a new electric dryer and have an electrician install the required 240V outlet if one isn't already present. You would also need a licensed gas contractor to cap the gas supply line safely. The reverse - switching from electric to gas - similarly requires a new appliance and a gas contractor to run the supply line. Replacing an aging gas dryer with a modern electric heat pump dryer is a reasonable choice in Ottawa for homeowners looking to reduce gas appliance dependency.

How long do gas dryers typically last? +

Gas dryers from reputable brands typically last 10 to 15 years with regular maintenance. The most important maintenance tasks that extend dryer lifespan are: cleaning the lint trap before every load, cleaning the exhaust duct annually, and ensuring adequate airflow through the vent system. These measures prevent the overheating cycles that degrade thermal fuses, heating elements, and control components prematurely. Gas dryers generally run slightly cooler than electric dryers and are somewhat more gentle on fabrics as a result. The gas components themselves - igniter, gas valve, flame sensor - are typically the first gas-specific parts to wear out, usually after 8 to 12 years of regular use. A dryer that is well-maintained and receives timely repairs on wear components can often run for 15 years or more.

Licensed Gas Dryer Repair in Ottawa and Gatineau

Gas dryer repairs that touch the gas circuit require a TSSA-licensed gas technician, that's not a suggestion, it's Ontario law. Home Appliance Care's technicians hold the required gas appliance licences and can diagnose and repair your gas dryer safely, correctly, and on a schedule that works for your household.

We serve Ottawa and Gatineau. Same-day and next-day appointments available. Book your repair call today.

Related reading: Dryer Repair Services in Ottawa and Gatineau