Overhead view of a gray outdoor AC condenser unit on a concrete pad beside a mulched garden bed and a house with vinyl siding.

AC Maintenance in Jefferson City, MO

Air conditioners here run from May through September, so April is the time for a tune-up. Tell us about your system, and a licensed contractor who covers Cole County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment

What kind of equipment?*

An outdoor air conditioning condenser unit mounted on a concrete pad next to a blue-sided residential house at sunset.

Five months of hard running in Jefferson City heat

Your air conditioner works May through September here, and on the hot afternoons it works hardest, when the temperature outside hits 87°F and stays there. The compressor runs long and often to keep up, and the coils and fan motor take that load every one of those five months.

Cole County also sees its share of hail and wind. Ten years of storm records show 17 hail events and 21 damaging wind events, with hail up to 3 inches. That kind of weather can bend fins on the outdoor coil or knock the unit out of level, damage that is not always obvious until the system is running hard again next summer. A tune-up checks the coil, the refrigerant charge, and the electrical connections before the next hot stretch puts them to the test.

5 months: May through September, your air conditioner is on duty
87°F: the average summer afternoon it cools against
17 hail events: in ten years, and hail bends the fins on outdoor coils
21 wind events: in ten years, and wind drives debris into outdoor units

Isometric cutaway illustration of a small house showing interior rooms with furniture, an indoor air handler with ducts in the attic space, and refrigerant lines running to an outdoor condenser unit on a pad.

Your air conditioner works hardest from June through August.

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NOAA nClimDiv, 1991–2020 normals

An outdoor central air conditioning unit mounted on a concrete pad beside a blue-sided house at sunset.

Book your AC tune-up in April, before homes here start needing cooling in May.

A tune-up checks the refrigerant charge, cleans the coils, tests the capacitor and tightens the electrical connections.

What does AC maintenance include?: A technician checks refrigerant pressure, cleans the condenser coil outside, and tests the capacitor and contactor that get the compressor running. They also check the condensate drain, since a clogged one can back up and cause water damage. Inside, the evaporator coil and blower get checked, and the filter gets replaced if it needs it. The whole point is to catch a weak part before it fails on the hottest day of the year.
How often does an air conditioner need maintenance?: Once a year, before the cooling season starts. Homes here run the AC from May through September, so getting it checked before summer gives a contractor time to order a part if something is wearing out. Summer afternoons here average 87 degrees, and that kind of heat puts real load on a system that has a weak capacitor or a dirty coil.
Is AC maintenance worth it?: Yes, because the parts that fail most often, the capacitor and the condenser coil, show warning signs before they quit. A technician catches a weak capacitor with a meter, or a coil so coated with dirt that the compressor is working harder than it should. Jefferson City has also logged 17 hail events and 21 damaging wind events over the past ten years, and a yearly check is when a contractor notices a dented coil or bent fins from a storm before they cause a bigger problem.

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