Hot Water Heating system uneven heat

Karen_2

Please help. We just moved into a house with gas forced hot water heat. There are 4 zones on the boiler, but one zone heats most of the house with cast iron radiators. This zone leaves the boiler and splits into a T. It seems that one half of the T goes to the back of the house (1st and 2nd floor) which gets nice and toasty. The other half of the T goes to the front of the house (1st, 2nd and part of 3rd floor) and is absolutely freezing, although the radiators do get heat...just not enough. The thermostat is on the warm side of the house so the cold rooms never catch up. Is there any way to adjust the amount/speed of hot water going to the back of the house vs. the front? It's clearly not even now. We don't know whether this has always been an issue, but the temperature difference is so dramatic that I can't believe it was always this way.
I'm not sure it's relevant, but you should know that when we first moved in we did what we shouldn't do and fiddled with the two return valves in that zone and accidentally shut off heat in the now hot part of the house. Our heating guy turned them both fully on and told us not to touch them, but I don't know if they were always fully on. He wasn't able to solve the disparate heat problem...he tried to open the cold radiators fully. This is a 1920's house that may have had a gravity system originally. I would appreciate any help possible.

Karen

Mad Dog

Very hard to tell from here, but................................

one of those valves on the return ((for the hot zone) could have been partially shut to divert more hot water in to the other zone. It could be as simple as closing that one down about 50%...try it. If not, get a pro in there to solve it. Mad Dog

To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"