is my programmer/timer installed correctly ?

[bigdavedave]

Hello ,
I have a honeywell timer on my system which is quite basic , controls rads and hot water with timers .

If i have only my hot water switched on I get hot water

if i have hot water and c/h switched on i only get c/h - no hot water

if i have hot water switched to continuous and c/h on a timed program the c/h stays on and i get no h/w - even the c/h is off at the timer the c/h is still working .

I have had my 3 way valve replaced and it is installed correctly ( i've checked the a and b outputs are feeding the right function )

please can anyone help ?

could it be my timer ?

thanks for any help

 

[bengasman]

Is there any setting at all where you do get dhw?

 

[bigdavedave]

I only get dhw when dhw is switched on independantly, i tried turning both ch and dhw on and turning the thermostat right down , no ch and no dhw !

 

[bengasman]

First guess would be wiring fault.

 

[bigdavedave]

thanks - it was a wiring fault to the 3 way valve