Hello. I own a home with two Aquatherm units made by First Co. One unit is in the basement and one is in the attic. We have perpetual problems with the upstairs unit air locking. If the airlock occurs while we are home, we can easily enough bleed out the air and the unit will resume working. BUT if we don't do that in time, our circulator pump burns out. I've already replaced it twice and I think it has happened again. I can't seem to find a repair service capable of fixing the airlock. I want to avoid sinking more money into misdiagnosing this problem and am lookign for a top notch repair person. I live in Virginia. Can anyone help?

The units are ignited by a gas boiler.

 

The best idea I can come up with is to install automatic air bleeders. Try talking the guys at www.heatinghelp.com/ They are the hot water heating experts.

 

Thanks for the url. Are automatic bleeders the same thing as vents? I've already had a vent put in the upstairs piping.