Heat pump pressure

[garyslater]

Hi
I have a heat pump installed when the house was built 7 years ago and serviced annually. Over the years I have noticed that this pressure gauge stays pretty stable. The last couple of days the pressure has dropped - to zero at lease twice and then regained pressure. Can anyone shed any light on what might be happening and why? Thanks in advance

 

[Mr Chibs]

These gauges can be affected by weather pressure, so just keep an eye on it, as you may not have an issue.

 

[garyslater]

Thanks very much, that’s helpful to know- it seems to have stabilised now.