No heat to the top floor rads

[starvinmarvin]

Hi everyone - long time lurker here, I recently fitted a new bathroom (first floor) in a 3 storey house with an unvented cylinder.

I replaced the radiator in said bathroom which works perfectly, but now the rads in the upstairs (2nd floor) dont fill/vent
The flow & return heating pipes going up the wall to the 2nd floor are hot - All ground & first floor rads work well. Boiler Pump turned up to max, tried balancing system, closing lockshields off etc any ideas?

 

[stevetheplumber]

assuming you havent changed any puipework to stop it it must be air or trvs stuck
shut rad both sides take out airvent and open each valve seperately catching water from the vent in a bucket
best done with system hot but boiler pump of

 

[justlead1]

Hi As Steve suggests. But check expansion cistern is full/filling and no crap stuck in cold feed.

 

[starvinmarvin]

Thanks for the replies -will try both