HC-01 Low
Your boiler has a fault with the thermometer that measures hot water temperature, meaning your hot water may be unreliable although your heating should still work.
Technical description: Domestic hot water (DHW) temperature sensor error. The boiler will continue to operate but you need to Contact a heating engineer
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 HC-01 — no call-out fees, no surprises.
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Parts commonly replaced
- DHW NTC Temperature Sensor
- Connecting Cable Harness
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