Sealed heating system
wrote in message
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hi there
I have a pressure prob with a sealed gfch system.
The pressure shoots up and down - according to the FAQ, this prob
means that the expansion chamber has failed, but when I check the
chamber, there is no water coming out of the valve - only air. Air
pressure is approx 10/11 PSI. I keep topping up water, but there is no
apparent leak...
Any ideas?
Is is a combi boiler or do you have a separate DHW tank?
If the latter there could be a leak of primary water from the tank coil into
your hot water system.
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