HVAC in St. Louis spends a long season fighting humidity that river storms keep renewing. Condensers sit in gangways and side yards and drown in fluff, then sit in water when the lot cannot drain. Cooling that runs without drying the house is a complaint. Winter heat is still real when the wind comes off the river. Brick holds the day's heat. Say whether you are sticky, cold, or looking at an outdoor unit that is standing in a puddle.
A furnace or boiler that bangs, smells hot, or short-cycles needs a plain report. Radiators and steam still heat a share of the older stock; forced air heats a lot of the rest. Do not mix a leaking boiler with a dead condenser. If the flue spills, get people to fresh air and lead with that. Condensate pumps fail when the drain they use is already backing up after a storm. Say if the basement drain was part of the night.
Window units in masonry openings drip on plaster and freeze the sash in winter if they stay in. If that is your cooling, say so. Filters clog faster in a long humid run. A closed return starves a system that otherwise seems fine. Gangway units with no clearance will not cool a top floor. Attic ducts sweat and leak. A room over a wet basement feels clammy even when the equipment is new to you.
Have the type: steam, hot water, or forced air. A tune is not a no-cool emergency on a heavy night. Replacement is not a pump repair. If only one unit in a multi-family building is hot or cold, say so. Describe the outdoor unit's location and whether storm water reached it. Backup heat that is a space heater should be called missing. River humidity will still be here after a quick reset.
Lead with no cool, no heat, a unit in standing water, or a leaking boiler. St. Louis storms make the basement part of the equipment story. Call the number on this page.