Glow worm ultimate 40ff

[Bernard Thorrington]

Boiler problems.
Water heating is now taken over
Its over riding the room stat: so I have no control
so when the hot water is on so is the heating
Programmer replaced 2 years go room stat 4years ago.
any idea's.

 

[JohnKay]

Hi
Sounds like a problem with a motorised valve stuck open. have you one or two valves on the system, and what make are they ?