help its doing my head in.

i have 7 rads, and a vaillaint 828e turbomax boiler.

I have heat to 3 rads upstairs

NO heat to the downstairs 4

I have hot water, but no water going to the shower.

me and me mate bled 3 rads downstairs, by using the valve at the bottom of the rad, re filled system. The one rad got hot, so i went to do the one in the lounge.

By the time i did that, the other rad i bled went cold. Now at the beginning of the year, we had an extension done to to the house and had a rad added. I am wondering whether the builder bled the whole system and if he had not could this be the cause of my problem, as it was ok beforehand?

On the new rad installed there is no bleed pipe underneath it. Is this right? Should i bleed the whole system, and if so how??




Thanks to anyone who can help me