BoilerFaultCodesYour boiler has stopped working because it isn't receiving enough electrical power from the mains supply or has suffered a sudden power drop.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Low voltage (less than 195v)
What causes this fault?
This fault occurs when the electrical supply entering the boiler drops below a safe working level, meaning the internal components cannot get the steady power they need to operate. The most common reasons are a general brownout in your local area, a failing mains power cable, or a fault within the boiler's own control board that prevents it from processing electricity correctly.
This fault can be more common during peak winter months or heatwaves when the national grid is under heavy strain, leading to localized drops in voltage.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like E385 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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