combi pressure

Joined
20 Nov 2007
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United Kingdom
please advise
i have a baxi boiler and the pressure keeps going up and down
i have removed the fill loop set boiler at 1.5bar on thursday and the pressure has crept up tho just over 2.5bar
can anyone help
 
What model is the combi.

Could be heat exchanger holed, allowing mains pressure into primary.
 
thanks clf-gas
could you tell me how much an heat exchanger would be and do i need a corgi guy to fit it.
 
Could,nt give a price as all suppliers are different, interweb and you will see.

Dont actually work on Baxi`s, though in general a good diy,er with a manual can do this job.
 
can i prove the problem by turning the mains water off and watching the guage
:?:
 

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