Why are my rads cold at the bottom only?

[marshy]

I have been in a new house for a year now. Recently I have noticed that the rads are cold at the bottom. I bled them & watercame out directly.

How can I cure this? I don't know if this is connected, but the water pressure used to knock you over when you got in the shower, not it's a trickle for a min or so then it comes out a bit quicker, but nothing like how it was previously. The heating system also comes on for about 10secs at night when there is nothing switched on.

It's weird & it's annoying me.

 

[brumylad]

it'll be a major sludge problem, sounds like a power flush needed, followed by new rads and a new boiler. With the shower failing it sounds like the problem has spread everywere, I'd say you probably need a new bathroom and drains relined.

...........I might be wrong though,

What sort of boiler do you have

does the shower have a pump to drive it (located under the bath or in the airing cupboard). Whats the make and model of the shower.

 

[marshy]

Everything new needed The house is 12 months old

 

[wilhelm]

were you on site? and annoy /upset the builders....

 

[ollski]

Everything new needed The house is 12 months old

sounds about right...cheapest parts available, cheap labour, no hot and cold system flush, no inhibitor, no proper bleeding = big sludge problems. We do 75% of our powerflushing business on properties less than 10 years old. If you go on one new estate round here and ask anyone if they have had a problem I will guarantee 100% will have had either leaking pipes / rads, or a leaking hw cylinder (minus alexander home builds). They put up 2000 homes in 2 years and quality suffered big time.

 

[namsag]

Try turning just the heating on and turning every rad off apart from one of them thats playing up and it should heat all over ,then turn that off and just have the other one on .When that heats up turn the other one back on and leve just these two on for about ten mins. Before turning on all the others everything should now be ok .If not you may well have sludge in them

 

[namsag]

BG by any chance olski