Radiator not getting hot neither is pipe work

[Willknapo]

I have a radiator in my living room which is not getting hot, water is coming through the valves and it's been bled. I drained it and changed one of the valves' (not TRVs) when I filled the rad back up the pipe on the right hand side got hot but now it's gone cold again (valve fully open) the left hand side still has the old valve on it and is currently closed. I can post a pic of the old valve if necessary. Any help would be fantastic

 

[gigz]

Open the other valve to get water flowing, if this is a wind up i fell for it

 

[HERTS P&D]

Turn on heating and turn off all hot radiators, check cold radiator to see if it is getting hot. If it is, then you will need to balance the radiators.

Andy

 

[Willknapo]

Just to confirm both pipes are cold and having both valves open still doesn't heat up the rad

 

[HERTS P&D]

" turn off all hot radiators"

Andy

 

[gigz]

Make sure both valves are open, then close the other rads to force water/air through the pipework, then open the other rads back up.

 

[Willknapo]

Cheers folks will give it a go

 

[chantelle]

Valve is knackered,you think it`s open, it aint.

 

[Willknapo]

Right so this worked for one cycle. I turned all other rads off and the one which wasn't working got hot and it stayed like that for one cycle. I balanced all other rads and now it's not working again. It's almost like the water in that rad just isn't heating up.