10/14/2026
Your air conditioner shouldn't be tested when it's below about 60 degrees outside.
That goes for my inspections too. A central air compressor is built to squeeze refrigerant as a gas. Run one on a cold day and some of that refrigerant can condense into liquid inside the compressor, and liquid doesn't compress. That can damage the compressor, which is the most expensive part of the system.
So from now until spring, when it's cold out, the AC on most inspections gets a visual check and a note in the report saying it wasn't run because of the temperature. Same goes for a heat pump in cooling mode. I still look at the age of the unit and its condition, the refrigerant lines, the drain line that carries off the water it pulls out of the air, and the shutoff switch by the outdoor unit.
Agents, set that expectation with buyers before the report shows up, so the line doesn't read like something got skipped. If the AC really matters to them, ask the seller for service records. An HVAC company can check it once it's warm enough, which in most fall deals means after closing.
Buyers, save this one for when you're reading your report this winter.