Gas Dryer Not Heating

A gas dryer that runs but doesn't heat is most often caused by a failed igniter, which is responsible for lighting the gas burner at the start of each cycle. A faulty gas valve solenoid, a flame sensor fault, or a gas supply issue can also be the cause. Any gas-related fault like this is best left to a professional rather than a home fix. 

Common Causes 

• Failed igniter. The igniter is what lights the gas burner at the start of each heating cycle. It's a part designed to wear out over years of regular cycling, and once it fails, the burner never lights even though the rest of the dryer runs normally. 
• Faulty gas valve solenoid. The solenoid opens the gas valve to let fuel reach the burner once the igniter is hot enough. If the solenoid fails to open, gas never reaches the igniter, so the dryer runs without ever producing heat. 
• Flame sensor fault. This sensor confirms the burner has actually lit and shuts off the gas supply if it hasn't, as a safety measure. A faulty sensor can shut things down prematurely even when the igniter and valve are both working correctly. 
• Gas supply issue. An issue further upstream, like a partially closed shutoff valve or a supply line problem, can prevent enough gas from reaching the dryer at all, regardless of how well the internal components are working. 

Safety Note 

Because this involves the gas supply and ignition system, it's not a fault to diagnose or repair yourself. If you smell gas at any point while checking this, stop immediately, leave the gas valve behind the dryer alone, and treat it as a gas odor situation rather than a simple heating fault. 

When to DIY vs. Call a Pro 

You can safely confirm the gas shutoff valve behind the dryer is fully open and check that the dryer is plugged in and receiving power, since the igniter itself is electric even on a gas model. It's also worth confirming the dryer's own power cord and outlet are in good condition, since a failing outlet can sometimes be mistaken for an ignition problem. Diagnosing the igniter, gas valve solenoid, or flame sensor requires a technician qualified to work on gas appliances. 

FAQ 

Is a gas dryer not heating the same issue as an electric one? 

The end result looks similar, tumbling with no heat, but the underlying parts are different since gas dryers rely on an igniter and gas valve rather than a heating element, so the diagnosis and repair are different too, even though the symptom feels identical to the homeowner. 

How do I know if the gas shutoff valve is open? 

The valve handle on the gas line behind the dryer should be parallel to the pipe when open and perpendicular when closed. If you're not sure, it's fine to leave this check to a technician rather than adjusting a gas valve yourself, since it's a simple thing for them to confirm on arrival. 

Is it safe to keep trying to run cycles while I wait for a repair? 

It's fine to leave the dryer plugged in, but repeated attempts to start a heating cycle won't fix an ignition or valve fault and just wastes time, so it's better to book a repair once you've confirmed it's not a supply or power issue on your end. 

Could this be a sign of a bigger gas line problem in my home? 

Not usually. Most gas dryer heating faults are isolated to the dryer's own igniter, valve, or sensor rather than the home's gas supply, but a technician can confirm that during the visit and put your mind at ease either way. 

Will the technician need to test the actual gas line? 

In most cases, the technician tests the components inside the dryer itself, like the igniter and valve, rather than the home's gas line, unless a supply issue is suspected after fully ruling out the dryer's own internal parts first. 

Gas heating faults need a qualified technician, and Boreal can diagnose and repair yours safely, backed by a 90-day warranty on parts and labour.