81-65 Low
Your boiler is still providing heating and hot water, but it has detected a problem with the temperature sensor for your solar thermal system.
Technical description: Domestic hot water (DHW) temperature sensor error. The boiler will continue in operation but solar sensor has an error
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 81-65 — no call-out fees, no surprises.
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Parts commonly replaced
- Solar temperature sensor (NTC)
- Sensor wiring harness
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