No Hot Water

[P Trap]

Hi,
I recently replaced a Sunvic 3port Mid pos valve with a Honeywell 3 port Mid pos, the Sunvic had only been in less than 12months when it developed a fault, when HW was called for it didn't respond at all, only the side CH worked. Having replaced the valve the problem is still there, I have wired the valve up as per the previous one, is there something I could check to see if have installed it properly? or could the problem be somewhere else?

Thanks

 

[Pssst]

What sort of programmer is fitted? i.e is it single or two channel?

 

[bill577]

Check at the cylinder stat that there is a HW output from the programmer and that the cyl stat is sending 240 to the boiler, what happens when you put the hot water and central heating on together ?

 

[P Trap]

Check at the cylinder stat that there is a HW output from the programmer and that the cyl stat is sending 240 to the boiler, what happens when you put the hot water and central heating on together ?

The central heating heats only, no hot water, when the system is switched off i can hear the valve go back to mid pos, is this any help?

 

[P Trap]

What sort of programmer is fitted? i.e is it single or two channel?

its a two channel Horstman programmer

 

[Vee]

Could be the cylinder stat stuck in the off position. Check metallic strip. Especially if it the blue metal sunvic one with the knob on top....