boiler problem help

[scarlet777]

i noticed that when i switch on water only boiler heats radiators as well, didn't have this problem before. What has happened ?

 

[dextrous]

3 port valve stuck in mid-position

 

[scarlet777]

can i fix it myself? or should i call engineer? how much will it cost?

 

[dextrous]

Fairly easy to replace if you can buy like for like (and hope that the pipes will be the right length), and follow the wiring to the letter.

Worth giving it a go yourself, and if you get stuck then bang the old one back on and call someone in to use what you have bought.

http://www.screwfix.com/cats/102632/Plumbing/Central-Heating-Controls will give you an initial feel for the cost of a replacement valve

 

[Gasop]

Check 2 port valve if vented system on S plan or 3port valve on Y plan.

These can jamb in the open position causing the problem you're experiencing.

Best to do this when system cold. Set to H W only and feel if outlet of 2 port or port A of 3 port getting hot when boiler starts up.

If gravity system with no valves then make sure pump not running when calling for H W only.

 

[scarlet777]

hi thanks for replies, the boiler is potterton conmi condensing , i dont think we can fix it ourselves as we know nothing about boilers we will have to get corgi man out , will this 3 way valve have to be replaced? and how much will it cost approximatly labor+part? and is it a big long job? how long will it take?

 

[kevplumb]

which potterton combi

it might have helped mentioning it in your first post

 

[scarlet777]

potterton powermax he

 

[scarlet777]

still waiting for replies....

 

[seco services]

waiting for what ?
you've already said you'll have to get the man out you know nothing on boilers.
end of.

 

[Hugh Jaleak]

Try Heateam, they offer fixed price repairs.

 

[scarlet777]

how much will it cost approx. and how long will it take