Heater ignites with a loud boom or pop (delayed ignition).
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Turn off power and gas. Delayed ignition can damage the heater and is a fire/explosion hazard.
Do not continue to operate the heater until it is inspected.
Technician-required actions: A qualified technician must remove and clean the burner assembly, verify igniter position, check gas pressure, and perform combustion analysis.
Repair Difficulty
Required Part
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