Air source heat pumps are efficient, reliable, and low-maintenance — but like any heating system, they can occasionally run into issues. The good news? Most problems are easy to identify, and many have straightforward fixes.
At Latent Heat Edinburgh, we’ve helped homeowners across the city and surrounding areas get their heat pumps back on track quickly. Below, we’ve listed some of the most common problems you might face — and what to do about them.
1. 🔇 Heat Pump Isn’t Heating Properly
Possible Causes:
- Thermostat settings may be incorrect
- Outdoor unit obstructed by debris
- System pressure may be low
Quick Fixes:
- Check and reset your thermostat
- Clear leaves or any debris from around the outdoor unit
- If it persists, call a certified installer (like us) to check pressure levels
2. 🔊 Strange Noises from the Heat Pump
Heat pumps usually produce a quiet hum. Clunks, rattles, or buzzing? Something’s up.
Possible Causes:
- Loose parts or debris in the fan
- Compressor or motor issue
- Ice buildup interfering with the fan
Quick Fixes:
- Turn the system off and inspect the outdoor unit
- Remove visible debris (safely)
- If noise continues, book a professional service
3. 🔌 Power or Display Issues
If your heat pump won’t turn on or shows an error message:
Possible Causes:
- Power outage or tripped fuse
- Thermostat battery flat
- Faulty internal component
Quick Fixes:
- Check your fuse box
- Replace thermostat batteries
- If error codes appear, consult your system manual or call an engineer
When to Call a Professional
While some fixes are DIY-friendly, don’t hesitate to call in expert help for:
- Repeated defrost issues
- Loss of heating performance
- Error codes you don’t recognise
- Anything involving refrigerant or internal components
At Latent Heat Edinburgh, we provide fast, friendly diagnostics and repairs across Edinburgh, the Lothians, Fife, and the Scottish Borders.
How to Prevent Most Problems?
Easy.
👉 Annual servicing
👉 Keep filters clean
👉 Ensure good airflow year-round
👉 Stay on top of system performance
Think Something’s Not Right?
Don’t put up with chilly rooms or mystery noises.
Contact Latent Heat Edinburgh for prompt, local support — whether you need a quick repair or just some reassurance.