BoilerFaultCodesYour boiler has detected an internal communication or sensor data error and has shut down to protect itself.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Display of failure code (chapter 11)
What causes this fault?
This fault occurs when the boiler's internal computer brain loses contact with its sensors or the control panel display. It is typically caused by a loose connection on the wiring harness or a component failure on the main circuit board that prevents data from being read correctly.
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 37 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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