BoilerFaultCodes b22 Medium
Your boiler has detected that the temperature sensors measuring your water flow are reading in the wrong order, likely because the pipes or sensors were installed backward.
Book a service
This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.
Technical description: Flow and return sensors reversed
Typical repair cost £120-250 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like b22 — no call-out fees, no surprises.
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