Low Mains Voltage

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.

Safe check: Do not reset the boiler. Contact a qualified electrician or your electricity provider, as the guide states.

Gas Safe registered engineer: If the low mains voltage continues, contact a qualified electrician or your electricity provider, as the guide states.