Rad's furthest from boiler, hot at top cold at bottom.

[rossyl]

Hi,

Here's the problem, PLEASE HELP!!!

Three rads furthest from the boiler are hot at the top but cold at the bottom, particularly near the outflow.

The Outflow pipe is cold. But the inflow hot.

The system was installed a year ago, and this problem only started a 2 weeks ago. No work has been done on the system.

I've bled them all, nothing's changed. I doubt its sludge due to the system being so new. Is it a case of balancing? and if so, how do I do this as I've no idea?

Its a bungalow, so all rad's on same floor. With a Potterton Combi Boiler (not sure model). There are 9 rads (inc one large one in the lounge). The furthest rad's from the boiler are 30 foot away. The rads are connected using flexi plastic piping.

All help appreciated, and please explain things in laymans terms, as i'm a novice when it coems to central heating.

Thanks

 

[chrishutt]

The system was installed a year ago

You really ought to get the installer back. There's a good chance that this problem is due to some deficiency of the original installation. It doesn't really matter if it's a little over a year, the installer still has a responsibility for any defect in the original installation.

It could be that the system needs balancing, which is covered by our new sticky reference thread above.