DIY Doctor

I cannot get all my radiators hot!!

Postby Angri » Sun Mar 09, 2008 2:16 pm

Good afternoon guys,

This is my first post - (and is done with a high degree of frustration!)

I recently had a thermostatic valve start leaking on a ground floor radiator, (and needed replacing)
so I turned off the CH water supply,
drained the whole system,
(opening the bleed valve on each radiatior)
replaced the thermostatic valve,
closed each bleed valve, (all rads)
turned on the water supply
Bled each radiatior, (starting from the ground floor & working up)
and, when all rad's filled, turned the CH back on.

all the 1st floor rads heated fine, but the ground floor rads remained cold.
So - I then extensively bled each ground floor rad until warm water reached the rad.

However, they still don't heat up . . it's clear I've an airlock somewhere - - but simply cannot understand what I've done wrong . . :oops:

And suggestions and advice will be gratefully acknowledged. . . . .
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Simply Build It

Postby sjlheating » Sun Mar 09, 2008 9:47 pm

simple solution is to turn all upstairs rads off. run the system ..if neccessary drain a little water from each leg of each downstairs rad. dependent on your system you may find it is an airlock in a manifold or simply on a branch to the downstairs rads. usually simply isolaing upstairs and opening each downstairs one in turn clears any airlocks
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Postby Angri » Mon Mar 10, 2008 10:04 am

SJL - - Thank you indeedy squire!

I followed your suggestion, and (you'll not be surprised to learn) that the problem is resolved . .

(It clearly was an airlock in a branch or two)

I am indebted to you for your excellent and timely advice - my evening was warmer than I had been anticipating!!!!!
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