"ARWadsworth" wrote in message
.uk...

"mike ring" wrote in message
52.50...
(Carl) wrote in
om:

Hi all, I am deperate for some help - my controller for my CH and HW
was damaged during some building works. I have bought an identical
controller and fitted exactly as it was but it will only turn on the
boiler for HW.

If I bypass the controller and connect the HW wire and CH wire to the
live - I have both HW and CH fine. But if I connect just the CH to
the live I get nothing??

Any help - I am stuck here!!!

Thanks in advance!

Sounds like a problem with the 3 port valve, if that's what you've got.

It could be. It could also be a gravity fed HW system with the new
programmer set to fully pumped not gravity settings.

That would be my first port of call. I haven't looked at new controllers for
20 years now but my old and still reliable (which must be a first as most of
the others weren't) Potterton EP3000 has a switch or moveable cam to be more
accurate to switch between the two systems.

--
Malc