vokera boiler problems

[molemcpherson]

i have searched various forum with varied results looking for help with my boiler.

i have a vokera combi boiler and the sealed heating pressure keeps rising.

i have done a few checks so far and was looking for some guidance or idea on what next.

so far i have :-

1 split the top up loop and it is fine not passing.
2. left the heating switched of overnight after draining the pressure down and it still rises off the scale.
3 i shut of the water supply into the boiler and opened the hot taps the pressure is dropping would i be right in saying this proves the heat exchanger is holed?

or could there be another problem.

thanks in advance Alasdair

 

[twgas]

certainly sounds like the dhw heat exchanger.

 

[kevplumb]

yup i would have to agree

 

[molemcpherson]

one more this what is the easiest way to add an inhibitor to the system? as i dont want to add it then bleed it back out once the repair is done.



thanks again
Alasdair

 

[kevplumb]

View media item 16004instructions on the box
you will need a caulking gun

yeah i know its cleanser in the pic btw

 

[molemcpherson]

thanks mate yea i seen the stuff you mean in screw fix, just to source heat exchanger now and hope it does the business if not its an expensive try

thanks again
Alasdair

 

[glasgowgas]

slow down moleman, firstly.....what model of Vokera boiler?? and why do you need to add inhibitor?

 

[ismellgas]

does it "blow off" ? couldnt the rise be a faulty expansion vessel..?

 

[kevplumb]

1 split the top up loop and it is fine not passing.
2. left the heating switched of overnight after draining the pressure down and it still rises off the scale.
3 i shut of the water supply into the boiler and opened the hot taps the pressure is dropping would i be right in saying this proves the heat exchanger is holed?

not ex v methinks