← Back to categories
🌡️
Problem Guides

Heat Pumps

Air source heat pump problems, fault codes, running costs and brand-specific guides

3 free DIY guides · 14 total

All guides
Daikin Altherma Heat Pump Problems — Fault Codes & Fixes
Daikin Altherma not working — 7H, A1, E3, EA codes and common faults· 30 min–3 hrs
›
Grant Aerona3 Heat Pump Problems — Faults & Fixes
Grant Aerona3 not working, poor performance or showing fault codes· 30 min–3 hrs
›
Heat Pump Error Codes — What They Mean and What to Do
Your heat pump is showing an error code or fault — here's how to respond· 15 min
›
Heat Pump Going Into Defrost — Is It Normal?Free
Heat pump stops briefly and blows cold air or steam — what's happening· 5 min
›
Heat Pump Low COP — Why Efficiency Is Poor & How to Fix It
Heat pump is running but efficiency or COP is much lower than expected· 1–2 hrs
›
Heat Pump Making Noise — What's Normal and What's Not
Unusual sounds from the heat pump outdoor or indoor unit· 15 min
›
Heat Pump Not Heating the House — Causes & Fixes
House is cold even though the heat pump appears to be running· 30 min–3 hrs
›
Heat Pump Not Working in Cold Weather — What to Do
Heat pump struggling or stopping when temperature drops below freezing· 30 min
›
Heat Pump Running Costs Too High — How to Reduce ThemFree
Electricity bills higher than expected since the heat pump was installed· 1–2 hrs
›
Heat Pump vs Gas Boiler — Which Is Right for Your Home?Free
Considering switching from a gas boiler to a heat pump? Here's what to know· 30 min
›
Mitsubishi Ecodan Heat Pump Problems — Fault Codes & Fixes
Ecodan not working, showing P1, P5, U7 or other error codes· 30 min–3 hrs
›
Samsung EHS Heat Pump Problems — Faults & Fixes
Samsung EHS Gen6 or ClimateHub not working — error codes and common issues· 30 min–3 hrs
›
Vaillant aroTHERM Plus Heat Pump Problems — Faults & Fixes
Vaillant aroTHERM not working, showing fault codes or underperforming· 30 min–3 hrs
›
Worcester Bosch Heat Pump Problems — Faults & Fixes
Worcester Bosch Compress 7000i or 5000 heat pump not working or showing faults· 30 min–3 hrs
›

Can't find your problem?

Request a guide and we'll write it — usually within a few days.

Request a guide →