The ground source heat pump worked well for about 2 weeks and then started shutting down with a low pressure alarm. This is normally due to an issue with circulation of fluid in the ground loops. Last Friday, we had to give up and turn the unit off altogether. We have now been without heating and hot water for the last week.
Initially, it was thought that it was dirt in the system, but there was no dirt in any of the strainers and the system was flushed to prove the point. Then it was thought that it was the pump that pumps the antifreeze around the ground loops. This was replaced, but the fault still persisted.
Neither the installer or NuHeat have been able to resolve the problem despite their best efforts. This issue now resides with Nibe who are the manufacturer of the ground source heat pump unit itself. Unfortunately, this means further delays as we have to wait for an appointment for the engineer to come out.
When the heat pump is back up and working, it will take 2-3 days at least for the property to get back up to full temperature. We are just gratefully that it hasn’t been too cold yet this winter!