R
rojroj
Some time back I posted a query in this Forum about Boiler either ignoring the Room Thermostat or the Programmer.
I was suggested (by doitmyself and others) to get the Sunvic MoMo 3 Port Valve replaced by a Honeywell.
After getting this done (Honeywell V4073A), the Boiler is now completely ignoring the Programmer.
Whenever, the room stat is calling for Heat, the Boiler turns ON (irrespective of whether the Programmer is ON or OFF).
I have programmed it to be OFF between 10 pm and 6 am. However, whenever the room temp drops below 18 deg Centigrade around midnight (I've set the Thermostat at 18 deg C), the Boiler fires up. I've also tried switching the Programmer to OFF position during the day while the Boiler is running and it made no difference (Boiler kept running).
The Programmer is a Honeywell 6400C with 3 On/Off and 7 day setting.
The Room Thermostat is a Honeywell (Electronic)
Anyone seen this type of problem or has any ideas ?
Thanks and Regards
I was suggested (by doitmyself and others) to get the Sunvic MoMo 3 Port Valve replaced by a Honeywell.
After getting this done (Honeywell V4073A), the Boiler is now completely ignoring the Programmer.
Whenever, the room stat is calling for Heat, the Boiler turns ON (irrespective of whether the Programmer is ON or OFF).
I have programmed it to be OFF between 10 pm and 6 am. However, whenever the room temp drops below 18 deg Centigrade around midnight (I've set the Thermostat at 18 deg C), the Boiler fires up. I've also tried switching the Programmer to OFF position during the day while the Boiler is running and it made no difference (Boiler kept running).
The Programmer is a Honeywell 6400C with 3 On/Off and 7 day setting.
The Room Thermostat is a Honeywell (Electronic)
Anyone seen this type of problem or has any ideas ?
Thanks and Regards