BoilerFaultCodesYour heat pump has detected an electrical fault within the wiring or the motor that drives the system, causing it to shut down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Short Circuit to Compressor Terminals
What causes this fault?
This fault occurs when the electrical current flowing to the heart of the heat pump is interrupted or takes a dangerous shortcut. It is most commonly caused by damaged internal wiring or an electrical failure within the compressor motor itself, which triggers a safety shutdown. Over time, vibration or moisture can wear down the insulation on these components, leading to this electrical malfunction.
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 L61 — 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.