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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> Rad not getting hot https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1107891270 Message started by Chaddy on Feb 8^th, 2005, 7:34pm

Title: Rad not getting hot
Post by Chaddy on Feb 8^th, 2005, 7:34pm

Hi guys. Added a new rad to my sister in laws house today. They use the garage as a games room and wanted it heated.
The hall rad pipes go throught the garage. I T'd off the feed and return pipes for that rad.
The problem is that the new rad doesn't get hot!! Hot water reaches the TRV and some is obviously getting in to the rad cause there is a slight difference in temperature between the top and bottom of the rad.
Also the hall rad doesn't get as hot as the rest of the rads in the house.
Any ideas??

Cheers
Ken ;D
;D

Title: Re: Rad not getting hot
Post by PEDANTICVINDICTIVEMAN on Feb 8^th, 2005, 7:54pm

If you have teed off 8m or 10mm size pipes you wasted your time, if you have teed off 15 mm pipes there should be no problem other than valves not open, air or dirt, take your pick.

Title: Re: Rad not getting hot
Post by Chaddy on Feb 8^th, 2005, 7:56pm

T'd off 15mm no air, so i guess it must be crud!!

Title: Re: Rad not getting hot
Post by JerryD on Feb 8^th, 2005, 8:00pm

more likely a balancing problem. Balance the whole system and it should work fine.

Title: Re: Rad not getting hot
Post by Chaddy on Feb 8^th, 2005, 9:14pm

Cheers jerry.
Can you just refresh my memory exactly how to, it's been a long time since i last did it and that was the only time!! :P :P

Title: Re: Rad not getting hot
Post by greg on Feb 8^th, 2005, 9:34pm

are the valves open?

have you tried closing one valve, bleeding rad, close that valve, open other valve, bleed rad

Title: Re: Rad not getting hot
Post by JerryD on Feb 8^th, 2005, 10:26pm

there's lots of websites on the subject of balancing

here's one

http://www.diydata.com/projects/centralheating/balancing/balancing.htm

Title: Re: Rad not getting hot
Post by Chaddy on Feb 8^th, 2005, 10:33pm

Thanks Jerry as i remembered it.

Title: Re: Rad not getting hot
Post by Chaddy on Feb 8^th, 2005, 11:54pm

Does anyone know where i can get radiator thermometers from ???