Air source heat pump fault finding is the process of diagnosing system issues such as water flow errors, refrigerant leaks, compressor faults, sensor failures, and electrical problems. In the UK, most faults can be identified and resolved with professional diagnostics costing £100–£800+, helping restore efficiency and prevent costly system damage.

Air source heat pumps are one of the most efficient heating solutions for UK homes, but many homeowners don’t fully understand how they work. This guide explains the main components—compressor, evaporator, condenser, expansion valve, and refrigerant—and their roles in delivering reliable heating. Learn how each part affects efficiency, running costs, and lifespan, plus common issues to watch for. We also cover maintenance tips and the impact of component quality on system per