Very strange central heating problem...advice needed please.

[dazzast]

Hi All,

I have a Potterton Prima 60F and about a week ago I was getting power on the switched live when a call for heat was requested. I played around with the CH zone valve and the boiler started to fire so I thought all was well. It wasn't! I'm not a plumber by trade but am not bad at DIY electrics.

The issue I have at the moment is that when I select CH on all the time from the programmer the valve opens but the pump does not start. If I turn off the CH and turn on the HW from the programmer the pump starts up. Should it not be the other way around?

I have a HW cylinder and 2 x 2 way Tower zone valves.

Cheers
Daz

 

[SimonG]

No such thing as diy electrics.

Need the testers out and trace the fault. Tower valves are pants.

 

[joni os]

Sometimes M valves open but wear in linkage means micro switch does not engage.

 

[nysk2008]

as above, get the multimeter out. power doesnt mean 240

 

[kris]

I agree , a screwdriver that lights up just doesnt cut it , best to get a qaulified electrician in b4 you set your house on fire , thats how accidents happen Daz
Welcome to the forum mate,

 

[marleyco]

Sounds like the ch zone valve isn't working