In message ,
ARWadsworth writes

"geoff" wrote in message
...
In message ,
ARWadsworth writes
The problem is that when only CH is called the boiler will not switch
off when the programmer switches off. The same happens when both HW
and CH are called for by the programmer and the HW is satisfied
before the CH.

The wiring seems to be fine and the mid position valve moves to the
correct position at all times and is correctly controlled by the room
stat and the cylinder stat.

Any ideas.

The only idea that I can come up with is that orange wire (which
stays at 90v when there is no power to the valve after calling for CH
only) is somehow tricking the boiler into staying running and I
suspect the boiler PCB is faulty.

How long have you been a regular here ?

How many times has someone been called a numpty for not saying what
boiler they have ?

-- geoff

Worcester 24Ri

I'll check tomorrow


--
geoff