An igniter starts combustion in gas furnaces and water heaters by creating a spark or heating to a high temperature. Common types include hot surface igniters and spark igniters. If the igniter fails, the system will not fire, making it a critical safety and reliability component.
/ɪɡˈnaɪtər/
An igniter starts combustion in gas furnaces and water heaters by creating a spark or heating to a high temperature. Common types include hot surface igniters and spark igniters. If the igniter fails, the system will not fire, making it a critical safety and reliability component.
What does an igniter do?
It starts the burner by creating heat or a spark to ignite the gas safely.
Source: The Cooling Company
Igniters initiate safe combustion in gas systems.
When the thermostat calls for heat, the igniter glows or sparks to light the burner and begin the heating cycle.
If ignition fails or the system clicks repeatedly, schedule service to test the igniter and flame sensor.
“If ignition fails or the system clicks repeatedly, schedule service to test the igniter and flame sensor.”
Modern electronic igniters replaced standing pilot lights for better safety and efficiency.
How long does a furnace igniter last?
Often 3-7 years, depending on usage and system conditions.
Can I replace an igniter myself?
It is best handled by a technician to avoid damage or safety issues.
Why does my igniter glow but not light the furnace?
The issue may be gas supply, a dirty flame sensor, or a failed valve.
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