How to Look After an Air Source Heat Pump in Winter
How Do Heat Pumps Work in Winter?
Heat pumps operate the same way year-round: they extract energy from the environment – air, water, or the ground – and convert it into heat for your home. In winter, air source heat pumps may use slightly more energy to meet increased heating demands due to colder outdoor temperatures, but they’re designed to handle sub-zero conditions efficiently.
What Happens to Heat Pumps in Cold Weather?
- Keep the Unit Clear
- Remove snow, ice, and debris like leaves and branches.
- Use a soft brush or broom to prevent damage to the fins.
- Insulate Exposed Pipes
- Pipe lagging prevents heat loss and reduces the risk of frozen pipes.
- Well-insulated pipes improve efficiency and reduce energy costs.
- Check for Ice Formation
- Ice buildup on the unit is normal and usually resolved by the heat pump’s de-icing cycle.
- Avoid pouring hot water over the unit—this can damage it.
- If de-icing isn’t functioning, contact a professional technician.

Top Tips to Protect Your Heat Pump
- Add a Cover or Snow Spacer
- Install a weather-resistant cover to shield the unit from snow or debris. Ensure it allows for proper ventilation.
- Consider a snow spacer to elevate the unit above ground level in snowy areas.
- Monitor Your System
- Watch for unusual noises, performance drops, or excessive ice.
- Adjust thermostat settings to balance efficiency and comfort.
- Annual Maintenance:
Temperature checks
Monitoring of system temperatures to ensure optimal heating performance.
All relevant pipework pressure tested
Testing pipework for leaks and verifying the pressure to ensure efficient operation.
Electrical circuits tested
Ensuring that all electrical connections and components are functioning safely and efficiently.
A full visual check
A thorough inspection of your heat pump to identify any visible issues or signs of wear.
System checks
A detailed evaluation of both the physical condition and performance of the system using diagnostic tools.
Professional advice
Expert guidance on optimising your system's settings and usage to maximise efficiency and longevity.
Simplify Maintenance with Wilson’s Packages
Preparing your heat pump for winter doesn’t have to be a chore. Wilson’s Maintenance Packages offer expert servicing and care to keep your system running smoothly, no matter the weather. From annual check-ups to emergency support, we’ll ensure your heat pump is ready to tackle the winter chill.

Stay warm this winter...
Contact Wilsons today or have a look at our maintenance plans.
