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Water heater not lighting
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Gas Water Heater Pilot Not Lighting? Gas Water Heater Troubleshooting
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Common solutions for: Water heater not lighting
01 - Igniter
Some water heaters use an igniter to ignite the gas. If the igniter fails, the burner will not light. To determine if the igniter is defective, first make sure the igniter is getting voltage. If the igniter is getting voltage, but it doesn’t glow, this indicates that the igniter is defective and should be replaced.
Required Part
Water Heater Igniter
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02 - Pressure Switch
The pressure switch closes when the proper airflow is achieved, signaling the control board to continue the ignition process. If the pressure switch is defective, the ignition process will stall, and the water heater will not light.
Required Part
Water Heater Pressure Switch
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03 - Thermocouple
The thermocouple detects the pilot flame. If the thermocouple does not detect a flame, the ignition process will stall, and the burner will not light.
Required Part
Water Heater Thermocouple
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04 - Pilot
The pilot ignites the water heater’s gas burner. If the pilot does not light, the water heater will not heat. Sometimes, carbon deposits can build up on the pilot and eventually create a restriction. If the pilot is restricted, try removing it and clearing it with a stiff brush and/or compressed air. If the pilot cannot be cleaned, replace it.
Required Part
Water Heater Pilot
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05 - Spark Electrode
Some water heaters use a spark electrode to light the pilot flame. The spark electrode sends intermittent high-voltage sparks to light the pilot. If the spark electrode won’t produce sparks, it is likely defective. If the spark electrode is defective, replace it.
Required Part
Water Heater Spark Electrode
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