Hi,
My heating was staying on even though it had reached temperature. On investigating further I discovered that if I turned down the room stat, the boiler fires up, if I turn it up the boiler stops ie complete reverse of intended. Result is that boiler won't turn off unless I turn up the roomstat, and then of course it won't turn itself on again. No changes have been made at all prior to it working perfectly. As a possible footnote, I'm sure that the water heating switched on is also supplying the rads with hot water. I checked the motorised 3 way valve responds to calls for water or heating and it does seem to operate when requested - I can't be sure it is turning the water valve as once fitted onto its spigot I can't tell (but the motor whirs so seems fine)
My heating was staying on even though it had reached temperature. On investigating further I discovered that if I turned down the room stat, the boiler fires up, if I turn it up the boiler stops ie complete reverse of intended. Result is that boiler won't turn off unless I turn up the roomstat, and then of course it won't turn itself on again. No changes have been made at all prior to it working perfectly. As a possible footnote, I'm sure that the water heating switched on is also supplying the rads with hot water. I checked the motorised 3 way valve responds to calls for water or heating and it does seem to operate when requested - I can't be sure it is turning the water valve as once fitted onto its spigot I can't tell (but the motor whirs so seems fine)
