heating but not hot domestic water

[billy192]

hi,
is it possible for my system to only give hot domestic water when the CH is on?
the reason i ask is now the weather is a bit warmer we did not have the heating on for two days and now we have no hot domestic water. if i put it on constant the boiler (out side) does not fire up. if i put the heating stst in the hall up and put the heating on constant boom the boiler fires,

a bit of background

its a worcester outside boiler (Oil)
a Barratt home 5 years old (yes my warranty is up)
I have had it serviced each year
around november 2014 we had the same problem and the guy they sent out was not a plumber / electrician
he changed the master switch in the kitchen still did not work
he then changed what he called the change over valve a square box with a little wire lever connected to a valve and a electric cable back to a box on the wall in the airing cupboard . he said the one he brought was different from the one fitted one had 3 wires (i think) and the other had 4.

he fitted it and all worked until now.

i can push the lever over or back but the boiler does not fire up. if the heating is on the water will get quite hot.

Help :32:

 

[SimonG]

Needs somebody to have a look. Should have a twin channel programmer and then either s plan or y plan. You need somebody who is comfortable with heating controls. Post your location, there may be somebody close to you on here who can help.

 

[billy192]

GL19 3ay Gloucester

 

[Kevin D]

Not if its a heatslave it wont,
If it's a Camray and never seen a service engineer it's probably close to death more information needed, but your better off getting an OFTEC registered engineer in mate.

Needs somebody to have a look. Should have a twin channel programmer and then either s plan or y plan. You need somebody who is comfortable with heating controls. Post your location, there may be somebody close to you on here who can help.

 

[SimonG]

Not if its a heatslave it wont,
If it's a Camray and never seen a service engineer it's probably close to death more information needed, but your better off getting an OFTEC registered engineer in mate.

Whys a heatslave got a motorised valve in the airing cupboard. Re read op.

Its a control issue not boiler.

 

[Kevin D]

Oops
I be a bit of a nob sometimes
walks away whistling face.

 

[SimonG]

Oops
I be a bit of a nob sometimes
walks away whistling face.

Not at all Kevin. Its not often I read all the first post

 

[OilBoy]

Not if its a heatslave it wont,
If it's a Camray and never seen a service engineer it's probably close to death more information needed, but your better off getting an OFTEC registered engineer in mate.

You don't necessarily need an OFTEC engineer, anyone who is competent in oil will do. Although if it is a Greenstar, you might find it hard to get someone, certainly not me. Refer them to a Worcester agent.

 

[SimonG]

Wrong end of the country for me.