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Hello, it's been a crazy week. I live in a 3 heat zone house (basement, main floor, upstairs). Old beast boiler, which also heats hot water tank. Please note, the thermostats/wiring have been checked at each stage do not present as the issue.
Last week the main floor heat went out. I called an unknown guy as it was an "emergency" and my trusted plumber/heating guy was not available. The new guy drained the entire system and replaced the main floor circulator with a new Taco 0015. We got heat back on the main floor, but then the upstairs heat would not stop pumping - even with everything off and the thermo completely disconnected. The regular guy came to handle and said the upstairs flow check-valve was the issue, so he replaced all three check valves and put in new shut off valves for each line so we wouldn't have to drain the system again. He also said the new 0015 (main floor) was too powerful and put in a 007... Now the upstairs heat works fine, but the main floor radiators (where the original problem was) won't stop kicking heat even when all thermos are "off" ... I have to shut down the whole system with the red master switch to get them to cool. Once I turn the master switch back on, the main floor rads heat up again without even turning the main floor thermostat on. I would say it was a flow check issue, but they were all JUST changed,
So... 1) no heat on main floor, then 2) heat on main floor back, but upstairs wont turn off, then 3) upstairs working again but now main floor heat stays on unless shut boiler down entirely.
I trust my regular guy, but I feel like this is spiraling and I'm looking for other thoughts and advice. So, any thoughts? Could it be an electrical problem within the boiler itself? Who would even address that as nobody wants to service this thing as it is for regular piping issues, etc.