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Pressure gauge problem?

I have a vaillant combi boiler which is approx 8 years old. I think there may be a problem with the pressure gauge. Gradually over time the pressure seems to drop to below 1.0 on the 'clock thingy' and every 3-4 months i have to increase it manually back upto to between 1.5 - 2.0. Is this normal? if not, does anyone know what the problem may be. Any help would be greatly appreciated, cheers.

2 Answers from MyBuilder Gas Engineers

The system is leaking water, could be a joint that needs tightening or something you can't see. Get some plumbers off this site to quote you?


Answered 10th Nov 2011

Your cold fill pressure should only be around one bar. I would look for slight wetness around radiator valves etc as it would only take a very small weep to cause a pressure drop over this period of time

Kind regards



Answered 11th Nov 2011

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