I have recently replaced 9 rads on my Combi system. Most have been replaced in the same positions apart from 3. Downstairs a large curved bay rad has been replaced with two smaller rads on the opposite side of the room.
In another downstairs room and in an upstairs bedroom one rad under a window has been replaced with two smaller ones either side of the window. I have put TRV’s on every rad. When the system is turned on everything works fine until the rads reach their individual temperatures.
The rads then cool down but then don’t re-heat when the room goes cold. Thinking the TVR’s may be faulty, I have replaced all of them with a better quality TVR – no change. I have drained the system endless times which has made no difference. I have done this type of work many times before and had no problems. Should the rads heat up again when the room temperature cools down? The rads are on no. 3 and there are no room thermostats.
Can anyone come up with any suggestions what the problem may be.
In another downstairs room and in an upstairs bedroom one rad under a window has been replaced with two smaller ones either side of the window. I have put TRV’s on every rad. When the system is turned on everything works fine until the rads reach their individual temperatures.
The rads then cool down but then don’t re-heat when the room goes cold. Thinking the TVR’s may be faulty, I have replaced all of them with a better quality TVR – no change. I have drained the system endless times which has made no difference. I have done this type of work many times before and had no problems. Should the rads heat up again when the room temperature cools down? The rads are on no. 3 and there are no room thermostats.
Can anyone come up with any suggestions what the problem may be.
