E.01 – .11 High
Your boiler's fan is not spinning at the correct speed, which is preventing the system from safely clearing exhaust fumes.
Technical description: Incorrect fan speed – external draught over the boiler or defective gas/air unit.
Typical repair cost: £250-£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 E.01 – .11 — no call-out fees, no surprises.
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Parts commonly replaced
- Fan assembly
- Gas valve
- Air pressure switch
- Main PCB
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