0E34 Medium
Your boiler's hot water sensor is reporting an unusual temperature reading, which means the system cannot safely heat your water.
Technical description: DHW sensor out of range (measures a temperature outside normal working range.)
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 0E34 — no call-out fees, no surprises.
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Parts commonly replaced
- DHW NTC thermistor (sensor cable)
- Wiring harness connection
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