Dryer gas ignition system ignites and controls the burner through interlocked safeties. Related symptoms include no heat, intermittent heat, clicking or gas odor. Those symptoms do not prove the component failed: verify airflow, gas supply position and observable ignition sequence.
What this covers
- gas dryers
What it does not cover
Differential
Likely causes of “Dryer gas ignition system”, and how to tell them apart
- 1
The gas valve is closed or the gas supply is off
What separates it The drum turns and the air is cold with no ignition sound, and other gas appliances also have no gas.
How to confirm Check that the gas valve to the dryer is open and that other gas appliances have gas.
- 2
A restricted exhaust makes the safety thermostat trip
What separates it The dryer heats for a short while and then goes cold and the vent is weak.
How to confirm Check airflow at the outside hood and clean the lint screen.
- 3
The igniter glows but the burner does not light
What separates it You see the igniter glow briefly and hear no flame, or it clicks repeatedly.
How to confirm Note the sequence from outside the machine without opening panels.
- 4
A coil, valve or sensor has failed
What separates it The airflow and gas are right and the ignition still fails, with no glow or no flame.
How to confirm These parts are inside the dryer's burner assembly and need a qualified gas-appliance technician.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the igniter glows, a flame appears, or there is clicking, and for how long.
- The position of the gas valve and the state of other gas appliances.
- The airflow at the outside hood.
Try in this order
0 of 2 completedTest before you replace
ReversibleVerify airflow, gas supply position and observable ignition sequence.
Weigh the repair
ReversibleReplacement difficulty for the dryer gas ignition system is professional for gas pressure, valve or combustion work.
Stop boundary
When this stops being a self-service repair
- !Leave the area and contact the gas utility or emergency services for a strong gas odor.
- !Replacement of ignition parts is professional gas-appliance work.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Is it safe to keep trying a gas dryer that clicks without lighting?+
No. Repeated ignition attempts with no flame can mean a gas fault. Stop and get a qualified technician.
What does the gas ignition system do?+
It lights the burner using an igniter and valves. If it fails, the dryer runs but does not heat.
Is it safe to check?+
Gas parts should be handled by a qualified technician. If you smell gas, leave and call your gas company.
What is the typical symptom?+
The drum spins but the air stays cool, or the burner clicks without lighting.