Worcester Bosch 42 CDi combi boiler losing pressure

Joined
12 Jan 2013
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Location
Glasgow
Country
United Kingdom
Hello,

I have an issue with my heating system that I can't seem to work out. I had a new partial system installed about. 18 months ago - Worcester Bosch 42CDi, 50 sq meters of underfloor heating, 5 new radiators (all downstairs). All of the radiators upstairs are original but the valves were changed to the temperature control type.

Since the job was completed the pressure gauge on the boiler keeps dropping into the red. There are no visible leaks anywhere and I have tried on numerous occasions to get the builder/ plumber to deal with it without success.

Since it was installed the pressure drops into the red within a week and I need to recharge the boiler accordingly.

It appears to be losing pressure faster now but still no visible leaks.

Any suggestions?

Dalginross
 
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