boiler shutting down and not heating up rads properly.

Hi can anyone shed any light on this.

I drained down a vented system to replace a faulty three port valve, along with replacing my rad valves with trv's. I fitted 4 out of the 6 rads and refilled the system. Now my boiler makes lots of noise and only heats two of my rads and then shuts down. i have bled the rads but the problem still persists can any one help or list possible factors that will cause this?

many thanks for taking the time to look at this

HI

you need to bleed more.check other venting points including boiler vent,pump vent( front screw),
dont worry the air will be released evntually in few days and boiler will be normal.try to use the minimum heat setting on the boiler until the air clears.

hi thanks for the reply, i have left it for a few days and the problem still exsists,rads have been bled and air came out but it is still happening can it be anything else?


thanks for taking the time to answer and help me




steve