Combi ALWAYS loses ALL pressure ONLY after using the central heating..

[atinwi]

Hey all
My combi heats water up no problem. And it heats up the central heating for hours, no problem. But after I've used the heating, the pressure is all gone!

Wassap? Thanks in advance!

 

[Deleted member 120897]

Wassap? Thanks in advance!

You have an expansion issue. Best getting an engineer in.

 

[atinwi]

You have an expansion issue. Best getting an engineer in.

Thanks. Any more clues?

 

[Deleted member 120897]

Thanks. Any more clues?

Clues for what? It’s an expansion issue or worst case dripping prv. In either case, it needs an engineer.

 

[atinwi]

Clues for what? It’s an expansion issue or worst case dripping prv. In either case, it needs thank you

 

[RoryD]

Hey all
My combi heats water up no problem. And it heats up the central heating for hours, no problem. But after I've used the heating, the pressure is all gone!

Wassap? Thanks in advance!

Find a GSR Engineer to reprise your expansion vessel

 

[atinwi]

Find a GSR Engineer to reprise your expansion vessel

Thanks for your answer. I have re-pressurised the expansion vessel to one bar. Is that what you meant?

 

[RoryD]

Thanks for your answer. I have re-pressurised the expansion vessel to one bar. Is that what you meant?

Yep, as long as you're au fait with the procedure. It's not Gas so you're fine

 

[atinwi]

Okay thank you very much. I did that today. I think I've tried that last winter but it didn't seem to work so maybe I will need an engineer and a new expansion vessel.

 

[RoryD]

Okay thank you very much. I did that today. I think I've tried that last winter but it didn't seem to work so maybe I will need an engineer and a new expansion vessel.

Unlikely you'll need a new vessel but not impossible. There is a couple of things you need to do to reprise correctly. By just filling from the top you're fighting against system pressure. It really is a 5 minute job. Bite the bullet and pay an engineer