HVAC in Ohio is a long heating season on the lake and a two-season grind inland. Furnaces and boilers carry the shore through gray months. Inland equipment still freezes hard, then has to pull humidity out of a hot attic summer. Heat pumps show up in newer houses. Older blocks may still run radiators. If there is no heat tonight, say that before the brand, and say whether you are on the water or well inland.
A dead compressor is not the first guess in July, and a dead boiler is not always the reason a lake house feels cold. Filters, a crushed return, and a bare attic hatch imitate both. Outdoor units on the shore disappear into drifts. Inland units ice up when snow melts and refreezes around the fan. Ask what was ruled out. Combustion gear still needs a clear flue and air.
Replacement follows the house. Windows, attic, and ducts change the load. Copying the old cabinet because it fit the closet repeats the same cold room. A new outdoor unit on an old coil is not a matched pair. Attic ducts in inland subdivisions bake. Basement ducts in older lake houses rust and collapse. Say which path you have. A no-heat night does not wait for a mild week that the shore may not offer.
Humidity is the inland summer complaint people misname as heat alone. Heavy air with a satisfied thermostat can be airflow or a coil. Condensate lines clog and stain ceilings that look like roof leaks. Window units in older upstairs rooms drip into plaster. Clear snow from an outdoor unit only if you can do it safely. Do not open a gas compartment to explore.
Say heat or cooling, shore or inland, and which floor fails. Have the model plate only if it is easy to read. If a freeze may become a claim, say so. Call the number on this page.