C2849 High
Your boiler has stopped working because of a communication failure between its internal electronic brains and a fault in the ignition system.
Technical description: Fault C; Chassis CodeProblem is controller area network wiring bus and modules.fault two; MFG – Manufacturer SpecificFault eight; Ignition System Or Misfirefault four; BBV Sensor Circuit Low Voltagefault nine; Kick-Down Switch Failed Short
Typical repair cost: £180-450 (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 C2849 — no call-out fees, no surprises.
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Parts commonly replaced
- Main PCB
- Wiring Loom
- BBV Sensor
- Ignition Electrodes
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