Just bought a KC home? Your first-30-days HVAC checklist

A pre-sale home inspection tells you the system "operated at time of inspection" — that's it. It doesn't tell you the equipment's age, whether the warranty survives the sale, where the shutoffs are, or what filter it takes. The first 30 days are your window to learn all of that while nothing is broken, because Kansas City's climate doesn't give grace periods: a home closed in April meets its first 95°F humidity test by June, and one closed in October meets a single-digit cold snap by January. Whether your new address is in Gardner, Blue Springs, or Parkville, this checklist is the same — and everything on it is free or nearly free except the last item.

• Photograph every data plate. Outdoor unit, furnace or air handler, water heater. The model and serial numbers date the equipment (many manufacturers encode the build year in the serial) and are the first thing any tech or warranty desk asks for. Most gas furnaces run 15–20 years and ACs and heat pumps 12–15, so the age tells you what season of life your system is in.
• Find your filter size — there may be more than one. Check the return grille and the cabinet slot; some homes have both. Buy a year's supply in the right size and a sensible MERV rating (Minimum Efficiency Reporting Value — how finely the filter catches particles). A filter that fits is one you'll actually change.
• Locate three things you'll need in a bad moment: the condensate drain and its float switch (a full pan shuts the system down on purpose), the outdoor disconnect box next to the condenser, and the breakers for the furnace and AC — label them now.

Three warranty and paperwork traps show up constantly on service calls to recently sold homes:

1. Assuming the manufacturer warranty transferred. Many manufacturer parts warranties do not automatically transfer to a new owner — some allow a transfer within a set window for a fee, some reduce the term, some void it. Look up your brand's transfer terms with the serial number, this month, while any window is still open.
2. No maintenance history. Without records, a warranty claim can get harder and you're guessing at the system's condition. Start a folder — paper or phone — from day one, and add every filter change and service visit.
3. Inheriting the previous owner's deferred maintenance blind. Sellers rarely tune up a system on the way out. Crusted coils, weak capacitors, and leaky ductwork pass inspection fine and then fail in the first extreme week you own the place.

A baseline inspection is the one line item on this checklist that costs money, and it's the highest-leverage one. A real tune-up — not a drive-by — measures refrigerant charge, capacitor values, temperature rise or split, blower amp draw, and static pressure, and checks the heat exchanger and flue on gas equipment. Those readings do two things: they catch the weak capacitor or dirty coil before your first July, and they establish the numbers every future visit gets compared against. On roughly 15-year-old equipment, it also starts the honest replacement conversation early, on your schedule, instead of during an emergency (our lifespan guide covers what to expect at each age). What should be on the tune-up itself is its own article: what an honest KC tune-up includes. Book it before your first extreme season — spring for cooling, fall for heating.

Here's the whole list: photograph all data plates and note equipment ages; find every filter location, buy a year of correctly sized filters, and change the current one; locate and label the condensate float switch, outdoor disconnect, and HVAC breakers; find your gas shutoff, water heater shutoff, and main water valve while you're at it; check the manufacturer's warranty transfer terms against your serial numbers; start a maintenance record; and book a baseline inspection before the first heat wave or cold snap.

If you'd rather put the whole thing on rails, our maintenance plan covers the seasonal inspections and keeps the records for you — one visit before summer, one before winter, and a documented history that helps at warranty time and again when you eventually sell. No pressure either way: do the checklist yourself and you're already ahead of most homeowners in the metro.