I recently bought a Cape Stye house and it is equipped with a Weil McLain Series 1 Boiler. The boiler is up and running fine except it is only heating the first floor; the base board radiators upstairs doesn't get hot, I opened the bleeding valve on each radiator to see if air/water is circulating, and they both bled for awhile with hissing sounds and water gushing out.
The day after I re-opened back the bleeding valves on the radiators upstairs and nothing comes out, as if the boiler isn't pumping water to the radiators upstairs, so thats when I took a pause and decided to get help. Could there be frozen lines upstairs or anything else on the radiator side that's preventing the circulation?
Thanks in advance Guys.
PS. (Both Zones/Floors are connected to a T pipe on the boiler).
UPDATE: Sorry for the late reply, It checked out to be frozen pipes. The weather went up to 60 degrees last week, I went to feel the upstairs zone's pipes and it was hotter than normal; I then went upstairs and I could feel the heat coming from the base board heaters as I was walking up. That made me very happy haha. Thank you guys for all the input.