Hi all
This is my first post so please forgive me if I am in the wrong forum.
My father in law asked me to change the room stat in his house recently from an old dial type to a more modern digital style. having performed this task in my own home and for my father, I was confident that I could do the job in pretty short order. I swapped the stat no problem (red into A, yellow into B, earth cut short and neutral terminated and tucked away) and all indications appear normal when switching the system back on. There is a small flame logo in the corner of the stat telling the boiler that a central heating demand is required and the boiler has fired up. This is where the problem begins, the boiler will not shut off once the required temperature has been reached. In order to get the boiler to turn off I have to set the program controller to off at which point the boiler shuts off. I am not sure if there are a number of issues with his system as the hot water light also comes on when the CH is set to 'ON' or 'ONCE' even though the hot water control is set to off which would suggest that the DHW is calling for heat.
When I asked him if this is 'normal' he said that he turns the CH off at the controller when the house is warm enough rather than letting the thermostat control what is happening and has done so for years and has not noticed anything unusual with the lights on the controller.
My first thought is that the program controller could be faulty however I cannot find anything on the web to suggest this. The new room stat is a Honeywell DT90E and the controller is a British Gas UP2, all in conjunction with an Ideal classic boiler. The system is a pressurised system.
Any help with this would be much appreciated although I have suggested that he call a gas safe engineer to check out the entire system as it is roughly 20 years old and could probably do with some TLC.
This is my first post so please forgive me if I am in the wrong forum.
My father in law asked me to change the room stat in his house recently from an old dial type to a more modern digital style. having performed this task in my own home and for my father, I was confident that I could do the job in pretty short order. I swapped the stat no problem (red into A, yellow into B, earth cut short and neutral terminated and tucked away) and all indications appear normal when switching the system back on. There is a small flame logo in the corner of the stat telling the boiler that a central heating demand is required and the boiler has fired up. This is where the problem begins, the boiler will not shut off once the required temperature has been reached. In order to get the boiler to turn off I have to set the program controller to off at which point the boiler shuts off. I am not sure if there are a number of issues with his system as the hot water light also comes on when the CH is set to 'ON' or 'ONCE' even though the hot water control is set to off which would suggest that the DHW is calling for heat.
When I asked him if this is 'normal' he said that he turns the CH off at the controller when the house is warm enough rather than letting the thermostat control what is happening and has done so for years and has not noticed anything unusual with the lights on the controller.
My first thought is that the program controller could be faulty however I cannot find anything on the web to suggest this. The new room stat is a Honeywell DT90E and the controller is a British Gas UP2, all in conjunction with an Ideal classic boiler. The system is a pressurised system.
Any help with this would be much appreciated although I have suggested that he call a gas safe engineer to check out the entire system as it is roughly 20 years old and could probably do with some TLC.