gloworm pressure loss

[BERNI L]

I am having a problem with my gloworm swiftflow boiler. Pressure drops to zero after 2 days. cannot find any leaks. If I re-charge to half a bar, boiler starts and settles at 2 bar.
can anybody suggest my next step. ps. I am a DIY.

cheers
BERNI L

 

[shneld]

Is the pressure relive valve showing signs of escaping water?

 

[BERNI L]

no visible leaks.

 

[shneld]

Just read on another thread that it’s possible the HE is leaking and passing via the condensate drain. not sure if thats a possibility????


How sure are you that you have checked all pipework and rads?

 

[BERNI L]

I have checked all rads, Only pipework not checked is under bedroom floor. Would a leak under bedroom floor show on downstairs ceiling ?.

 

[PlumbingSucks]

Any pipes in concrete?

 

[JimH]

I have checked all rads, Only pipework not checked is under bedroom floor. Would a leak under bedroom floor show on downstairs ceiling ?.

I had a similar problem - things to check
Two pipes to an outside drain - 1) from the condensate (water release each time the boiler fires up). 2) from the pressure relief valve (should be no water leaking unless overpressure in system)
3) is there excessive steam release after the boiler has stopped running (exhaust vent)?
4) Obvious one - any damp patches in ceilings or walls?

 

[BERNI L]

no pipes in concrete. all pipework is under the bedroom floors.

 

[BERNI L]

Thanks, I have done your checks but no joy.

 

[JimH]

Have you checked the pressure in the expansion vessel? - beginning to suspect you may have a slow leak in the bladder?