Upstairs radiator cold at bottom but hot at top

Joined
15 Jun 2010
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Northumberland
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Hi all,

We had our new boiler installed about 6 months ago now. When we had it done, we had the plumbers do a powerflush and when the system was refilled, an inhibitor was added.

My wife mentioned to me the other day that the rad in our bathroom was hot at the top but cold at the bottom. I was in there bathing the little one tonight and noticed the same thing. The rad doesn't need bleeding.

I've seen some other posts and seen that sludge is normally the cause, but I was under the impression that would normally only affect rads on ground or lower levels. So how is this happening with a 1st floor rad?

Any ideas?
 
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Sludge can affect any radiator. May be worth removing it and flushing it out in the garden with a hosepipe.
 
Are the valves fully open to it? It probably just needs balancing.
 

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