On a gas dryer, a drum that turns normally but produces no heat and no flame most often means the igniter is not glowing. The igniter is the single most commonly failed part in this fault pattern, though a faulty gas valve coil or flame sensor can produce very similar symptoms.
Diagnosing beyond simple observation of the ignition sequence, and any work on the gas valve, burner assembly or flue connection, should be handled by a qualified gas engineer. Never attempt to bypass, force, or manually light a gas dryer burner.
How gas ignition works
A gas dryer’s ignition sequence runs in a specific order: the igniter heats up and glows, then the gas valve opens, then the flame lights and the flame sensor confirms it. Where that sequence stops tells a technician exactly which component has failed.
Common causes
| Cause | How likely | What to look for |
|---|---|---|
| Failed igniter | Very common | No glow at all, no ignition sound |
| Faulty gas valve coils | Common | Igniter glows, but the valve never opens and no flame appears |
| Failed flame sensor | Common | A brief flame lights, then dies immediately |
| Gas supply issue | Occasional | Other gas appliances in the home are also affected |
| Blocked vent restricting airflow needed for combustion | Less common | Same airflow issue that affects electric dryers |
How to diagnose it
- Confirm the gas supply
Check whether other gas appliances in the house are working normally. If none of them are, the issue is with the gas supply itself, not the dryer.
- Check the vent
A significantly restricted vent can affect the combustion process on some models. Clean the lint filter and check the duct is clear as a first, safe step.
- Observe the ignition sequence
With the lower panel removed and the dryer running a cycle, watch carefully. Note exactly which stage it fails at: no glow at all, a glow with no gas flow, or a flame that lights and then dies.
When to call a professional
Once you have observed where the ignition sequence breaks down, hand that information to a qualified gas engineer — it points directly at whether the igniter, the gas valve coils, or the flame sensor needs replacing, and all three are gas-appliance repairs that should be handled by a professional.
Stop and call a qualified appliance technician or electrician if you find scorched or melted wiring, smell burning, see water that has reached electrical components, or if the fault returns immediately after a repair. Never bypass a safety device — thermal fuses, door interlocks and flood switches fail for a reason, and defeating one converts a broken appliance into a fire or flood risk.
