Dryer Not Heating? Here's How to Solve It (Complete Guide)

If your dryer tumbles but your clothes come out cold and damp, you are dealing with one of the most common appliance complaints in Canadian homes. The good news is that most dryer heating problems have a straightforward cause, and some can even be fixed without a service call. Whether you own a Samsung, LG, Whirlpool, Maytag, or any other brand, the same core components are responsible for producing heat.

In this guide, we cover the seven most common reasons a dryer stops heating, explain the difference between gas and electric dryer issues, give you a step-by-step DIY checklist, break down repair costs, and help you decide whether to repair or replace your unit.

Gas vs Electric Dryers: Why It Matters

Before you start troubleshooting, you need to know whether you have a gas or electric dryer. The answer determines which components can fail and how dangerous the repair can be. If you are not sure which type you own, check the back of the unit. An electric dryer plugs into a large 240-volt outlet (the plug has three or four prongs), while a gas dryer uses a standard 120-volt outlet plus a gas line connection.

Both types share the same vent system, lint trap, drum, motor, and cycling thermostat. Vent-related issues affect both equally, and a clogged vent is the single most common reason for a dryer to stop heating regardless of fuel type.

Top 7 Causes of a Dryer Not Heating

A clogged dryer vent is the single most common reason a dryer stops producing heat, and it is also the most dangerous. When lint, debris, or even bird nests block the exhaust duct, hot moist air cannot escape. The dryer overheats, and the thermal fuse or high-limit thermostat trips as a safety measure, shutting off the heat while the drum continues to spin.

Symptoms of a clogged vent:

• Clothes take two or three cycles to dry completely
• The dryer feels extremely hot to the touch on the outside
• The laundry room becomes hot and humid during a drying cycle
• You notice a burning or musty smell
• The exterior vent flap does not open when the dryer is running
• Lint is visible around the dryer door seal

How to fix it yourself: Pull the dryer away from the wall and disconnect the flexible vent hose from the back. Look inside the hose and the wall duct for lint buildup. Use a dryer vent brush kit (a long flexible rod with a brush head, available at hardware stores for $20 to $40) to clean the entire length of the duct, all the way to the exterior vent hood. Check outside to make sure the flap opens freely and is not blocked by ice, snow, or debris. Reconnect everything and run the dryer on high heat for a few minutes to blow out any remaining lint.

Rigid vs flexible duct: Flexible foil and vinyl ducts are common but they sag, kink, and accumulate lint much faster than smooth rigid metal duct. Building codes in most Canadian municipalities require rigid or semi-rigid aluminum duct. If your home uses a flexible foil or vinyl hose, replacing it with rigid aluminum dramatically reduces lint buildup and fire risk.

The thermal fuse is a one-time safety device designed to cut off the heating circuit when the dryer overheats. Once the fuse blows, it cannot be reset. The dryer will tumble normally but will produce no heat at all. This is the most common single-part failure behind a dryer not heating, and in almost every case, the root cause is a clogged vent that allowed the dryer to overheat in the first place.

Symptoms of a blown thermal fuse:

• Dryer runs and tumbles but produces zero heat (not even warm air)
• On some models (particularly Samsung and LG), a blown thermal fuse prevents the dryer from starting at all
• The problem appeared suddenly rather than gradually

Where to find it: The thermal fuse is mounted on the exhaust duct or the blower housing inside the dryer cabinet. On most Whirlpool, Maytag, and Kenmore dryers, it is behind the rear panel. On Samsung and LG front-load dryers, it is typically on the heating element housing behind the front lower panel or rear panel. On GE models, it is often near the burner (gas) or heating element (electric). You will need to remove the appropriate panel to access it.

How to test and replace: Disconnect the dryer from power. Remove the fuse (it has two wire terminals) and test it with a multimeter set to continuity. If the multimeter does not beep (no continuity), the fuse is blown and must be replaced. The fuse itself costs $8 to $20 from any appliance parts retailer. Before installing the new fuse, clean the entire vent system to prevent the same problem from happening again within weeks.

Electric dryers use a coil of nichrome wire (the heating element) mounted inside a metal housing. When electricity passes through the coil, it glows red-hot and heats the air that is blown through the drum. Over years of use, the coil can develop weak spots, sag and touch the housing (causing a short), or break completely. When the element fails, the dryer drum will spin but no heat is produced.

Symptoms of a failed heating element:

• No heat at all, or the dryer starts hot then quickly goes cold
• If the element is grounded (touching the housing), the dryer may trip the breaker
• Clothes take much longer to dry, and the air in the drum feels lukewarm at best
• You may see visible scorch marks inside the element housing

Brands most commonly affected: Samsung, LG, and Whirlpool dryers tend to see heating element failures more frequently, especially in models that are 5 to 8 years old. This is not a defect but simply a high-use wear part that experiences significant thermal stress during every cycle.

How to diagnose: Unplug the dryer and access the heating element (usually behind the rear panel or inside the lower front). Visually inspect the coil for breaks or areas where it touches the metal housing. Test with a multimeter for continuity. A broken element will show no continuity. The element part itself costs $20 to $65, but replacement involves disassembly and reassembly of internal components. We recommend having a certified technician handle this repair.

Gas dryers use two or three electromagnetic solenoid coils to open the gas valve when the igniter reaches the correct temperature. Over time, these solenoids weaken and fail to hold the valve open reliably. This is one of the most common causes of intermittent heating in gas dryers, where the dryer heats at the beginning of the cycle but then stops heating partway through.

Symptoms of faulty gas valve solenoids:

• The igniter glows bright orange, but the gas never ignites (or ignites briefly then stops)
• Heating is intermittent: the dryer heats at the start of the cycle but clothes are still damp at the end
• You may hear a faint clicking sound near the gas burner area
• The problem gets worse over time as the solenoids weaken further

Important safety note: If you smell gas at any point, turn off the dryer immediately, shut the gas supply valve, open windows, and leave the area. Do not flip any electrical switches. Call your gas company or 911.

How to fix: Gas valve solenoid replacement should only be done by a certified technician. The parts are inexpensive (usually $15 to $30 for a set), but the repair involves working directly with gas components. The technician will also check for gas leaks after completing the repair.

The igniter is a flat, fragile bar (usually made of silicon carbide or silicon nitride) that glows white-hot to light the gas burner. It is one of the hardest-working parts in a gas dryer, cycling on and off many times during a single drying cycle. After thousands of cycles, the igniter can crack or weaken to the point where it no longer reaches the temperature needed to open the gas valve.

Symptoms of igniter failure:

• The igniter does not glow at all when the dryer starts (no visible glow through the small viewing port near the burner)
• If the igniter glows but appears dim or orange instead of bright white, it may be too weak to trigger the gas valve
• No heat and no gas smell during operation

How to diagnose: With the dryer running, look through the small opening near the burner assembly at the bottom front of the dryer. The igniter should glow bright orange or white within 60 to 90 seconds. If it does not glow at all, the igniter has failed. If it glows but gas does not flow, the gas valve solenoids are the more likely cause.

How to fix: Igniter replacement requires accessing the burner assembly inside the dryer. The part costs $25 to $50, but due to the fragility of the igniter (it can shatter if handled roughly) and the involvement of gas components, this repair is best handled by a certified technician.

The cycling thermostat is a small disc-shaped sensor that monitors the air temperature inside the drum. Its job is to cycle the heating element or gas burner on and off to maintain the temperature you selected. When it fails, the heater may not turn on at all, or it may run continuously and overheat the dryer. A failed cycling thermostat is often confused with a thermal fuse problem, but there is an important difference: the cycling thermostat regulates temperature during normal operation, while the thermal fuse is a safety backup that only activates during overheating.

Symptoms of a failed cycling thermostat:

• Dryer runs but never heats (thermostat stuck open)
• Dryer overheats and clothes come out extremely hot or scorched (thermostat stuck closed)
• Inconsistent temperatures from load to load
• The dryer works on some heat settings but not others

How to diagnose: The cycling thermostat is usually located on the blower housing or the exhaust duct inside the dryer. Test it with a multimeter for continuity at room temperature. It should show continuity when cool. If it shows no continuity at room temperature, it is stuck open and needs replacement.

How to fix: The part costs $10 to $25. A certified technician can test, remove, and replace the thermostat in under an hour. This is one of the more affordable professional repairs.

Modern dryers use an electronic control board (also called the main PCB) to manage all functions including the heating circuit. If the relay on the board that controls the heating element or gas valve fails, the dryer will run normally but will not produce heat. Control board failure is less common than the other causes on this list and is usually only suspected after ruling out the simpler, more likely problems first.

Symptoms of control board failure:

• No heat despite all other components testing normal
• Error codes displayed on the control panel (check your owner's manual for codes)
• The dryer behaves erratically: buttons not responding, random cycle changes, or display flickering
• Burnt or discoloured components visible on the board when inspected

How to diagnose: Control board diagnosis requires testing voltage outputs and comparing them to the manufacturer's specifications. This is not a DIY repair. A certified technician will check for 240V output to the heating element (electric) or 120V to the gas valve (gas) to confirm the board is faulty before recommending replacement.

How to fix: Control board replacement costs $150 to $350 for the part alone, making it the most expensive repair on this list. If your dryer is older than 10 years and the board has failed, this is the point where replacement of the entire unit may make more financial sense.

Dryer Vent Cleaning: The Most Important Maintenance Task

Regular dryer vent cleaning is the single best thing you can do to prevent heating problems, reduce fire risk, and extend the life of your dryer. A clean vent allows the dryer to exhaust hot moist air efficiently, which means shorter drying times, lower energy bills, and less stress on internal components like the thermal fuse and heating element.

How Often to Clean Your Dryer Vent

The general recommendation is to clean your dryer vent at least once a year. However, you may need to clean it more often if:

• You do more than 5 loads of laundry per week
• You have pets that shed (pet hair clogs vents faster than lint alone)
• Your vent duct is longer than 15 feet or has multiple bends
• You use dryer sheets (the residue contributes to buildup over time)
• Your dryer is located far from an exterior wall

Step-by-Step Vent Cleaning Guide

Signs Your Vent Needs Cleaning Now

• Drying times have gradually increased over the past few months
• The top or sides of the dryer are hot to the touch during a cycle
• Your laundry room feels humid or warm when the dryer is running
• Clothes have a musty or damp smell even after a full cycle
• The exterior vent flap barely opens or does not open at all
• It has been more than 12 months since the last cleaning

Cost to Repair vs Replace Your Dryer

Deciding whether to repair or replace a dryer that is not heating depends on the age of the unit, the cost of the repair, and whether other components are showing signs of wear. Use this guideline to make the right choice:

A new entry-level dryer starts around $500 to $700, while a mid-range model with moisture sensors and steam features runs $800 to $1,200. Compare the repair cost against these numbers when making your decision. Our technicians will always give you an honest recommendation. If replacement makes more financial sense, we will tell you.

Dryer Repair Cost Breakdown

The table below shows typical all-in repair costs including parts and labour for the most common dryer heating repairs in the Toronto and GTA area:

All prices include parts and labour. Nick's Appliance Repair charges a $65 diagnostic fee that is credited toward the cost of repair if you proceed. That means you only pay the diagnostic fee if you decide not to go ahead with the repair.

Dryer Not Heating by Brand

Some dryer brands have known patterns for heating failures. Here is what our technicians see most often in Toronto and the GTA:

Samsung Dryer Not Heating

Samsung dryers are among the most common calls we receive. The most frequent cause is a blown thermal fuse (DC96-00887A or DC47-00016A depending on the model), which sits on the heating element housing. Samsung electric dryers are also prone to heating element failure after 5 to 8 years of use. For Samsung gas dryers, the igniter wire harness can develop a fault causing intermittent heating. Always check error codes first. Samsung dryers display codes like HE (heating error) or dE (door error) that can point to the root cause quickly.

LG Dryer Not Heating

LG dryers frequently suffer from a failed thermistor (temperature sensor) rather than a traditional thermal fuse. The thermistor sends incorrect temperature readings to the control board, causing the heater to shut off prematurely or not activate at all. LG dryers also use a flow sense feature that detects restricted airflow. If you see a d80, d90, or d95 error code, your vent is 80 to 95 percent restricted and needs immediate cleaning before any other diagnosis is done.

Whirlpool and Maytag Dryer Not Heating

Whirlpool and Maytag (same parent company) dryers are very repairable and have straightforward heating systems. The most common causes are a blown thermal fuse (part 279973), a failed heating element (part 279838), or a faulty high-limit thermostat. Parts are widely available and affordable. These dryers typically last 12 to 15 years with proper vent maintenance.

GE Dryer Not Heating

GE electric dryers most commonly have heating element failures, while GE gas dryers often have igniter issues. GE dryers from 2015 onward may display error codes on the control panel. Check the user manual for your model. A common GE-specific issue is a failed radiant flame sensor on gas models, which prevents the gas valve from opening even when the igniter is working correctly.

Frequently Asked Questions

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