One radiator not heating up!

[honda3]

Hi looking for some advice please.

One radiator on the middle floor is not heating up all others are fine including the two in the loft.

There are no thermostat valves fitted on this rad. Ive checked the valves to make sure they open fine, taken the rad off and flushed it out.. the only thing i can see as a problem is the pressure coming into the rad is very low. The pressure from the outlet side is high. I dont quite understand why! Thanks

 

[martygturner]

Crud build up if the pressure is fine...add some cleaner or turn the rest off of the rads off and try flushing the inlet

 

[honda3]

I did bleed the inlet of aprox 1litre before i put it all back together. But the pressure was no way near the outlet pressure side.

Its like the pressure from the outlet side is so high it wont let the inlet flow

 

[terryplumb]

The pipework that has slow flow is restricted, partially blocked or its valve is.
Try closing EVERY other rads TRV ,see if problem rad heats fully.

 

[honda3]

So i turned everything off but that rad and its heating up! Before the inlet pipe was getting warm, now its very hot.

 

[honda3]

Its not the valve as i did take them off and check them and all was ok

 

[honda3]

Bottom off rad is still not that hot

 

[terryplumb]

Should be getting fairly even heat after 20 mins or so. You can then turn
on the other rads .
If the problem rad cools ,or doesn't heat tomorrow ,the system will probably need balancing.