Vaillant 828e pressure drop if heating switched off/on

GibsonGoldTrim · 10 Feb 2010

We have a Vaillant 828e which from new gradually reduces pressure if I set the heating to go off at night and on in the morning, a plumber has said that this is to be expected, but as the boiler is in the attic it's not the easiest thing to keep an eye on. if I leave the heating on all the time the pressure stays ok!

Any ideas greatly appreciated.

Pete.

Mozza00 · 16 Feb 2010

Pressure variations are normal with hot-cold cycling and for your boiler the range should be between 1-1.5 bar.

GibsonGoldTrim · 16 Feb 2010

Mozza00 - Thanks for the response, unfortunately the pressure continues to drop until I have to re-pressurise the system. If I leave the heating on there is no pressure drop.

bobw1956 · 16 Feb 2010

Your pressure drop is not to be expected,you have a leak somewhere,check the pressure relief pipe which exits outside,then the rest of thye system.

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Vaillant 828e pressure drop if heating switched off/on

GibsonGoldTrim

Mozza00

GibsonGoldTrim

bobw1956

DIYnot Local

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