Radiator wont heat up

Postby chrisroberts » Sun Mar 23, 2008 12:08 pm

Hi was wondering if anyone could help, i have a combi boiler located in the cupboard upstairs. all upstairs rads are really hot but the 2 in the living room are cold. i shut the valves off and removed the rad, blasted the rad thru with water and its perfectly clear. i then opened the t r v and only got a slight trickle when draining down yet when opening the return there was a good flow until system was empty. i replaced the t r v and refitted rad and filled system. i left both vales shut on rad then i opened the flow and bled air, rad got hot until i opened the return valve. could this be a case of a restriction in the flow pipe to the rad and how cud i romove it? wud a chemical flush sort this problem out? Thank you Chris.
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Simply Build It

Postby ALDA » Mon Mar 24, 2008 1:24 pm

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Postby rosebery » Mon Mar 24, 2008 1:52 pm


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Postby macten » Thu May 01, 2008 1:06 pm

Bet the f+r pipes run vertical. As rosebery says - airlock.
Shut off all the upstairs rads and put the heating on (not the hot water) and wait for a gurgling sound and the airlock will be gone.
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