Fan running but no ignition at electrodes
| Fault | Fix |
|---|---|
| air pressure switch hoses loose | check ports and firmly fix |
| split / kinked hoses | remove kink / replace hose |
| water in hoses (condensation) | dry hoses / replace hoses |
| reversed pressure connections (hoses wrong way around) | correctly connect hoses |
| split/punctured air pressure switch diaphragm | replace air pressure switch |
| damaged combustion chamber seals | replace entire seal |
| cracked pilot window or damaged seal | replace glass / seal |
| faulty air pressure micro switch | replace air pressure switch |
| flue / airway ducts blocked at terminal | clear restrictions/blockages |
| faulty fan (not at full capacity) | check/ lubricate bearings | clear debris build up |
| blocked / melted venturi | replace fan assembly |
| ignition electrodes cracked | check / replace electrodes |
| ignition wiring harness damaged / loose | check wiring / connections |
| faulty spark generator on p.c.b. | replace p.c.b. |
| ignition electrodes gap too far apart | check gap (as per manufacturer’s instructions) |
Find A Gas Safe Heating EngineerOther Issues to check
- Noisy Fan
- Noisy Pump
- Noisy Hot Water Flow Switches
- Noisy Solenoid
- Burner Not Igniting
- Boiler Fan Problems
- Boiler Shuts Down
- Explosive Ignition
- Blocked Plate Exchanger