Before I call a heating company, I want an idea of what’s what. I’m a senior and don’t want to be oversold. I have an old Weil-McClain boiler, working fine, but recently hit 30 pressure a couple times, so the release valve/pipe spewed water. Have ancient vertically installed steel expansion tank on second floor in closet, which sounds empty - nothing attached except pipe going through wall at top with no turn off. There are two small cap like things(screws?) protruding on front side though. It has been bitter cold, boiler constantly running, and I am worried water has no place to expand, so I bled radiator to let some water out to make room.(this might be stupid?). I’m not in a position right now to replace boiler. What can/should be done here? Is this fixable? Are we talking a very high repair cost or reasonable? Any comments would be appreciated. It seems like a big deal, time consuming/messy, plus with Covid I don’t want repairman all over the house if possible. Thank you.
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