HVAC in Cleveland is a long lake heating season first. Boilers and radiators still carry a lot of older doubles and brick houses. Furnaces are jammed into basements beside water heaters and laundry tubs. The outdoor unit spends real time buried, and salt slush refreezes around it. Summer humidity still arrives, but if there is no heat tonight that is the whole call. Say boiler or furnace before you describe a brand.
A cold room is not always a dead boiler. Heat leaks through a bare attic hatch, a fireplace that will not seal, and plaster walls the wind can find. That lake wind makes a small gap feel like a failed system. On the cooling side, a choked filter or a collapsed duct can imitate a dead compressor during the humid stretch. Ask what was ruled out. A rusty heat exchanger or a bad flue is not a filter story and should not wait on a thaw.
Replacement has to respect a house that runs heat for a long gray season. Matching the old cabinet repeats the cold back bedroom. Radiator houses and ducted houses are different plans. Hanging new outdoor equipment on an old coil will not behave like a matched pair. Ducts in a damp basement need a look before they are reused. Say steam, hot water, or forced air. Combustion equipment needs air and a clear flue in a tight cellar.
Clear snow and ice from the outdoor unit only if you can do it without forcing the fan or climbing a drift. Window units in upstairs rooms drip into plaster and become a wall problem when summer does show up. Condensate lines that were fine in mild weather freeze or clog. Do not delay a no-heat call to hunt a model plate in the dark. If a freeze loss may become a claim, say that. Do not open gas compartments.
Say heat or cooling, and whether the house is a double, a single, or a narrow frame with an addition. Name the floor that fails. Call the number on this page.