combi boiler problem

[joe39]

I have a halstead quattro/wickes combi 2000,the hot water temp is low..with c/h off,h/w tap on..boiler will light and stay lit,but water is cold.With c/h on..h/w tap on water is hot for 10 seconds..then is warm(not hot enough for a bath)c/h works fine,water pressure is fine,boiler runs at 1 bar

 

[oilman]

Check motorised valve operation

 

[joe39]

Thanx for your reply,oilman.Do you mean the divertor valve?,I have checked that,the plunger moves up,and stays up when the h/w tap is on,then drops down when tap is off,any more suggestions,cheers

 

[ChrisR]

Still sounds like diverter valve. With everything cold (!) turn a hot tap on and grope the pipes under the boiler. One of the fat ones will be the flow pipe - written underneath usually. If the flo gets hot , it's the DV which isn't steering boiler water to heat the hot tap water. Can happen even if the shaft IS moving.

 

[oilman]

Does that valve feed water to the heat exchanger? I don't know anything about gas boilers, but I was thinking there might be a motorised valve Looks a bit like this

 

[joe39]

Still sounds like diverter valve. With everything cold (!) turn a hot tap on and grope the pipes under the boiler. One of the fat ones will be the flow pipe - written underneath usually. If the flo gets hot , it's the DV which isn't steering boiler water to heat the hot tap water. Can happen even if the shaft IS moving.

Chris r,you are a star!,did exactley what you suggested,you were a 100% correct,fitted new d/v valve today...and enjoyed a lovely HOT! bath,thank you so very much.