BoilerFaultCodesYour heat pump has stopped working because its internal electrical circuit has detected a power surge or is drawing too much electricity to protect itself from damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Overcurrent Protection Error
What causes this fault?
This fault occurs when the heat pump’s internal sensors detect an electrical current that is too high, causing the system to shut down to prevent a fire or permanent damage. The most common reasons are a malfunctioning inverter board that can no longer regulate power or a mechanical failure in the compressor or fan motor that causes them to pull excessive electricity.
This fault can be more frequent during summer heatwaves, as the system has to work harder to reject heat, which can cause aging electrical components to overheat and draw more current.
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 P3 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
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.
Affiliate links — we may earn a commission at no extra cost to you.