Unknown
Low mains voltage on Keston Combi 30

Keston Combi 30 fault code Low mains voltage

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

What the manual says

Manufacturer manual

Low mains voltage. Contact electricity provider.

From this model's manual
Verified against the Keston/Keston 30c 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 32 fault codes on the Combi 30

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

818283848586878889909192939495BCC FaultFalse Flame LockoutFan FaultFlame LossFlow Temperature Overheat LockoutFlow Thermistor FaultIgnition LockoutLow water pressureNo water flow lockoutOutside sensor faultOverheat lockoutPCB FaultReset the boilerReturn Thermistor FaultReturn Thermistor Fault (No water flow)Too many resets

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