2948 B High
Your boiler is struggling to keep its flame lit during operation, which is causing it to stop and restart frequently.
Technical description: No flame signal. With low output the burner starts automatically after cleaning. If the fault occurs repeatedly, the setting of the CO2 valves need checking
Typical repair cost: £120-300 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like 2948 B — no call-out fees, no surprises.
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Parts commonly replaced
- Flame sensing electrode
- Gas valve
- Ignition lead
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