Ruud
Ignition Sequence Interruption
Boiler fan runs but burner never lights; no error code displayed
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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.
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Possible Causes
Faulty igniter, no gas supply, gas valve not opening, pressure switch not proving
How to Fix / Troubleshooting
Safety first: Turn off power and gas. Do not attempt to light the burner manually.
- Verify gas supply: Confirm gas shutoff valves are open and other gas appliances work.
- Listen for ignition: During startup, you should hear clicking (spark) or see the hot surface igniter glow through the sight glass. If not, the igniter may be faulty.
- Inspect igniter: Remove and visually inspect for cracks or damage. Replace if suspect.
- Call a technician: If the igniter is good, further diagnosis of the gas valve and safety chain is required by a professional.
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Repair Difficulty
Hard
4/5
Required Part
Igniter Assembly
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