Heating fine but only lukewarm water for days now? :(

[gothicsanta]

I have a tank fed CHS and there is an electric solenoid on the 3 port valve to determine if heating only, hot water only or both.

I have now removed this from the manual valve that it sits on, yet I still cant get anything but lukewarm water.

The tank has a thermostat on and I hear it click when I move it to the lowest setting < 30C (it is set on 60C usually) so I think this part is fine.

I have opened the bleed screws near the tank but no air comes out, just water, so not that.

I am wondering if the manual valve itself has failed as I am not sure of any other explaination?

The manual valve turns around by hand constantly, ie, not hard stop in either direction. ? Is this correct?

Not really sure ho to set this to HW and Heating, have tried a few positions but no HW yet....

HELP!

 

[gothicsanta]

Further info....

Just noticed that the bottom half of the tank is stone cold but top half to third is hot...

Anybody?

 

[gothicsanta]

Nobody any ideas??

 

[Agile]

From what you have said I have no idea unless your boiler flow temp is too low.

Maybe you need a heating engineer?

Tony

 

[gothicsanta]

Boiler temp fine, rads red hot. Think I will have to call the pros...

 

[Agile]

Its a question of the boiler temp when you are heating hot water only!

Tony