A pilot light is a small, continuously burning flame in some gas-fired HVAC systems and water heaters. It ignites the main burner when heat is needed, allowing quick ignition without electronic systems. Because it burns continuously, it uses a small amount of energy even when the appliance is idle.
/ˈpaɪlət laɪt/
A pilot light is a small, continuously burning flame in some gas-fired HVAC systems and water heaters. It ignites the main burner when heat is needed, allowing quick ignition without electronic systems. Because it burns continuously, it uses a small amount of energy even when the appliance is idle.
What does a pilot light do?
It provides a constant flame that ignites the main burner when heat is needed.
Source: The Cooling Company
Pilot flame ignites the burner and works with safety sensors.
A homeowner relights a water heater pilot after a draft extinguishes it, restoring hot water safely by following the manual.
A steady blue flame is normal. Yellow or orange flames signal a problem that needs professional attention.
“A steady blue flame is normal. Yellow or orange flames signal a problem that needs professional attention.”
Pilot lights have been used in gas appliances for over a century as a reliable ignition method.
Why does my pilot light keep going out?
Common causes include drafts, a dirty pilot, or a failing thermocouple.
Can I relight a pilot light myself?
Often yes, but follow the manufacturer instructions carefully and shut off gas if you smell fuel.
Is a pilot light safe?
Yes when maintained properly, but issues like yellow flames or frequent outages require service.
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