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how to lower the BAR pressure on BIASI 24S combi boiler?? ?

The BAR pressure is at 4 all the time and the overflow leaks quite alot, i have had British gas out 4 times now they still havent fixed it!!!! PLEASE PLEASE HELP??
Andy, December 2008
Sounds like the plate heat exchanger has gone.
Get them back out.If you ring Biasi's technical helpline they will tell you this.
BG are overrated.

Joshmcfee, January 2009