9.1.2 Your heat pump has stopped working because water is not circulating correctly through the outdoor unit.
Your heat pump has stopped working because water is not circulating correctly through the outdoor unit.
What to check first
- Check that your central heating system pressure is between 1.0 and 1.5 bar
- Ensure all radiator valves and external isolation valves are fully open
- Check the outdoor unit for any debris or ice blocking the area
- Reset the system at the control panel
Parts commonly replaced
- Circulation Pump
- Flow Switch
- Magnetic System Filter