Baxi Combi 80 Eco

[Davenlois]

Help. I'm having a strange problem with my boiler.The CH pressure keeps rising to about 3 bar.The top up link is removed so I've no idea how it keeps re-pressurising itself. When I turn on the hot water the pressure g/g goes up and then back when I turn the tap off.At present I'm relieving the pressure using the white plastic drain cock next to the press.relief v/v. Any ideas anyone?The boiler is 4 years old.

 

[baxpoti]

The plate heat exchanger is probably leaking internally.

To prove this, turn off the cold mains to the boiler

 

[LUNAT]

HI


This is common fault with these boilers.Hot Water heat exchanger need replacing.

 

[Davenlois]

Many thanks for the speedy replies. Looks like I need to replace the plate heat exchanger. Fairly straight forward??
I'm reasonably competent with a spanner!

 

[ChrisR]

Yes, careful though they cut your fingers!

 

[LUNAT]

HI

make sure to drain fully first because water will run down on the P.C.B.
use plastic bags to cover p.c.b.etc.