A couple of years ago we had a combi installed to replace our ancient Vulcan. The rads had a high velocity flush out and then some radiator fluid put in to help prevent sediment. Just of late I have noticed that the bottoms of the rads are not warming up but the tops are. There is no air inside as I have checked. How on earth can the bottoms be cold when water at the top is red hot ? I don't understand how when gravity would surely bring the water down to the bottom.
Anyway, I think it's a balancing issue (so I was told by the last plumber we had who sorted the problem for a while) and Ihave been tweaking the taps here and there getting full heat back in some but not in others. There are 5 rads in all, 2 downstairs and 3 upstairs. All have 2 taps except the bathroom and front bedroom which only have one. Non have thermostats.
If anyone can instruct me on how to get to the bottom of this I would be very grateful as it's proving a headache. The front room rad is the one that always eventually runs cold after a few weeks without it being touched. Why once it has been set it should do this I don't know. The plumber didn't understand how it could happen either.
Anyway, I think it's a balancing issue (so I was told by the last plumber we had who sorted the problem for a while) and Ihave been tweaking the taps here and there getting full heat back in some but not in others. There are 5 rads in all, 2 downstairs and 3 upstairs. All have 2 taps except the bathroom and front bedroom which only have one. Non have thermostats.
If anyone can instruct me on how to get to the bottom of this I would be very grateful as it's proving a headache. The front room rad is the one that always eventually runs cold after a few weeks without it being touched. Why once it has been set it should do this I don't know. The plumber didn't understand how it could happen either.