Igniter
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.
💡 Key Takeaways
- ✓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.
- ✓Igniters are fragile and should be handled by professionals.
- ✓Dirty or worn igniters can cause no-heat calls.
- ✓Annual maintenance helps prevent ignition failures.
Igniter
/ɪɡˈnaɪtər/
Definition
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
Quick Facts
How Igniter Works
Igniters initiate safe combustion in gas systems.
Real-World Application
When the thermostat calls for heat, the igniter glows or sparks to light the burner and begin the heating cycle.
Pro Tip
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.”
Important Things to Keep in Mind
- Igniters are fragile and should be handled by professionals.
- Dirty or worn igniters can cause no-heat calls.
- Annual maintenance helps prevent ignition failures.
Did You Know?
Modern electronic igniters replaced standing pilot lights for better safety and efficiency.
FAQ
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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