35 High
Your boiler has failed to ignite or stay lit, meaning your heating and hot water have stopped working.
Technical description: Boiler does not activate
Typical repair cost: £120-450 (including labour)
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.Try resetting the boiler using the 'R' or reset button on the control panel.Ensure your system pressure is between 1.0 and 1.5 bar on the pressure gauge.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 35 — no call-out fees, no surprises.
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Parts commonly replaced
- Ionisation Electrode
- Ignition Lead
- Gas Valve
- PCB
*Affiliate links — we may earn a commission at no extra cost to you.