Good Morning,

I have a newer boiler system-1998 in a 2 story house, (but it still has an old style expansion tank).

I have 15lbs pressure reading on the gauge, but I do not have any heat in 2 radiators on the top floor. I have tried to bleed, but little or no air is coming out of the bleeders. Valves are turned on!

In a previous post it was mentioned that you can increase the water pressure to help bleed the system. I am hoping this could help my situation, but I don't know where the "pressure adjustment" is and if it is the right thing to start with.

I also wanted to know if there were any special techniques in bleeding the rads? Can I open more than 1 valve at a time? Does the boiler need to be on-running while I do it?

Thanks,