F37 High
Your boiler's outdoor temperature sensor is reporting an error, which may prevent your heating from working efficiently or starting up at all.
Technical description: External probe fault sensor damaged or short circuited – check the wiring
Typical repair cost: £90-180 (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 F37 — no call-out fees, no surprises.
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Parts commonly replaced
- External temperature probe
- Sensor wiring harness
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