cold rad

[dontknowitall]

So is this thread finally over....

Aachhoooooo!!!

Oops, excuse me!

 

[sparky3366]

I've got this rad not getting warm.....hehehehehe:svengo:

 

[fuzzy]

im waiting for the thread titled 'Warm rad'

 

[LegionellaSlave]

bump :waving:

 

[PlumbBobBob]

bump :waving:

why?....

 

[dontknowitall]

Think it's gone cold again.

Well found, Legionella!!

 

[AWheating]

it should be cold its the summer

 

[dontknowitall]

... its the summer

Not round here it ain't!

 

[AWheating]

Not round here it ain't!

its still too hot for me, i like it nearer to zero.

 

[LegionellaSlave]

I have 1 cold rad in a downstairs cloakroom.
I have flushed it, tested the valves ( not trv ) and connected a hose from the o/side tap to each valve to blast any air-locks.
I have turned off all other rads and it still won't work.
I have replaced rad with a length of 15mm pipe and the pipe gets hot immediately! Put a new rad back on and it works for 2/3 days then fails.
If I draw 1/2 a bucket from the return pipe, hot water is drawn thru the flow pipe and the rad works for 2/3 days.
I know it could be a blockage, either air or sludge, but how come I can always draw hot water thru if I drain from the return pipe?
It seems as if there is something stopping the free flow thru the system which I can by-pass by encouraging the flow when draining.
I would be interested in advice as to what should be my next step.
Someone must have come across this before!!
Thanks

Let's go again!

500 posts before xmas :santa1: