Hi
I have a Honeywell ST699B 24-hour central heating controller with separate heating and hot water controls, and a three port valve system.
Unfortunately of late, I cant put the hot water on on its own........the radiators always come on as well. What is more, sometimes the radiators remain on even when I switch all the controls off. The radiators also sometimes get very hot even when the thermostat has been set at a moderate level.
Is this a problem with the Honeywell controller - I know they can be temperamental and its the second one we have had - or is it more likely to be a problem with the valve?
cheers
I have a Honeywell ST699B 24-hour central heating controller with separate heating and hot water controls, and a three port valve system.
Unfortunately of late, I cant put the hot water on on its own........the radiators always come on as well. What is more, sometimes the radiators remain on even when I switch all the controls off. The radiators also sometimes get very hot even when the thermostat has been set at a moderate level.
Is this a problem with the Honeywell controller - I know they can be temperamental and its the second one we have had - or is it more likely to be a problem with the valve?
cheers