Low
Outside Sensor Fault on Keston Combi 30

Your boiler is having trouble communicating with the weather sensor outside your home, but it should still continue to keep you warm in the meantime.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Outside Sensor Failure

From this model's manual
Verified against the Keston/Keston Combi 30 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 14 fault codes on the Combi 30

Seeing a different code? Every code this model can display, in one place.

Boiler Type Card FaultFan FaultFlame LossFlow Thermistor FaultIgnition LockoutLockout 6Low Mains VoltageLow Water PressureOverheat LockoutPCB FaultPCB ReplacementReturn Thermistor FaultToo Many Resets

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