E24 High
Your boiler has detected a problem with the sensor that monitors the water temperature returning from your radiators, preventing the system from operating correctly.
Technical description: Central heating return sensor error – possibly damaged
Typical repair cost: £90-160 (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 E24 — no call-out fees, no surprises.
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Parts commonly replaced
- Central heating return NTC sensor
- Wiring harness
- Main circuit board (PCB)
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