I recently drained and refilled my CH system. After refilling and bleeding the
rads all was well until the following morning when one radiator remained cold.
There was no air in the top of the radiator and the pipes (microbore) were
warm, I drew some water, and I think some air, off through the drain cock and
the radiator heated up, however it has never heated up again without drawing
more water through.


The system is open vented, the feed and expansion tank is full and clean(ish)



Any ideas? Help much appriciated

Subject: Warm house - cold radiator
From: (Steveburtonuk)
Date: 09/12/03 09:14 GMT Standard Time
Message-id:

I recently drained and refilled my CH system. After refilling and bleeding
the
rads all was well until the following morning when one radiator remained
cold.
There was no air in the top of the radiator and the pipes (microbore) were
warm, I drew some water, and I think some air, off through the drain cock and
the radiator heated up, however it has never heated up again without drawing
more water through.


The system is open vented, the feed and expansion tank is full and clean(ish)

The system is not balanced properly. Water is not getting to that rad because
it's all going through the others. You need to close down the rad valves on
each rad by the right amount to balance the flow through the system. I'm sure
if you try an experiment by shutting all the other rads down you'll find this
one heats straight up.


Dave Baker - Puma Race Engines (www.pumaracing.co.uk)
I'm not at all sure why women like men. We're argumentative, childish,
unsociable and extremely unappealing naked. I'm quite grateful they do though.