BoilerFaultCodes E37 High
Your boiler has lost its connection to a temperature sensor responsible for reading the water returning to the system, causing it to stop functioning for safety reasons.
Call an engineer soon
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Return sensor interrupted (T2)
Typical repair cost £120-£220 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E37 — no call-out fees, no surprises.
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