Y Plan, no hot water but heating is working when called

[Chopper9495]

Hi everyone,

Looking for a bit of advice, recently went to a job where heating was operating when called for however not for the hot water. I have changed the 3 port actuator Honeywell head however this doesn’t seem to have solved the issue, does this mean that the programmer is faulty? Or is there something else I’m missing, any help be much appreciated

 

[ShaunCorbs]

Are you getting 240v when hot water is calling eg orange ?

 

[Chopper9495]

Are you getting 240v when hot water is calling eg orange ?

Hi mate,

Haven’t tested this, what would this prove?

 

[ShaunCorbs]

Hi mate,

Haven’t tested this, what would this prove?

If you have a call for hot water

 

[Chopper9495]

Proving that the programmer is therefore faulty and would need to be replaced ?

 

[ShaunCorbs]

Proving that the programmer is therefore faulty and would need to be replaced ?

Could be cylinder stat need to test down the line

 

[John.g]

This schematic may help.
On HW only, the orange wire will only have 230v because its back fed from the cylinder stat "call" contacts.

 

[Chopper9495]

This schematic may help.
On HW only, the orange wire will only have 230v because its back fed from the cylinder stat "call" contacts.
View attachment 94226

Thanks mate, so really it’s either to be the programmer or the cylinder stat?

 

[John.g]

Looks that way, a multimeter would tell alot, you will get some idea if its the cylinder stat if theres a click when you turn it up and down.