An outdoor air conditioning condenser unit positioned on a concrete pad next to a blue-sided house, surrounded by green shrubs and flowering hydrangeas at sunset.

AC Repair in Duncan, OK

Air conditioners here run from May through September. If yours quits, tell us what it's doing and a licensed contractor who covers Stephens County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
Aerial view of a square outdoor air conditioning condenser unit on a concrete pad beside a house wall with a sliding glass door.

Five months of Duncan heat, on a system that also takes the hail

Your air conditioner runs from May through September here, and on a 93°F afternoon it doesn't get a break between cycles. The compressor stays under load for hours at a stretch, and that steady strain is what wears out a capacitor or pushes a weak compressor into failure. When that happens, the unit outside runs but the air coming out of your vents turns warm.

Stephens County has also logged 104 hail events and 67 damaging wind events over the past ten years, with hail up to 2.75 inches. That kind of storm bends the thin fins on your outdoor coil and can crack a fan blade, and either one shows up as an AC that struggles to cool or won't turn on at all.

5 months
May through September, your air conditioner is on duty
93°F
the average summer afternoon it cools against
104 hail events
in ten years, and hail bends the fins on outdoor coils
67 wind events
in ten years, and wind drives debris into outdoor units
Isometric cutaway illustration of a single-story house showing interior rooms with ductwork and an air handler, connected by refrigerant lines to an outdoor condenser unit on the left.
Your air conditioner works hardest from June through September.

NOAA nClimDiv, 1991–2020 normals

Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

A new air conditioner would cut about $50 a year off cooling for a typical Stephens County home.

  • A new one at the federal minimum, 14.3 SEER2$370 a year
  • An older air conditioner$420 a year

Estimates for a typical Stephens County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Oklahoma fuel prices and NOAA climate normals. Your home will differ.

Repair makes sense when a part like a capacitor or contactor has failed.

Replacement makes sense when the compressor has failed or the system uses R-22 refrigerant, which is no longer made.

Oklahoma requires HVAC contractors to hold a state license.

The Construction Industries Board tests and licenses the contractor, not the job itself, so the same license covers this repair and every other HVAC job that contractor takes on in Stephens County.

For an air conditioner repair, that license is what stands behind the work. If the repair involves opening the refrigerant side of the system, the technician also needs EPA Section 608 certification, which is a federal requirement in every state, not something Oklahoma adds on top.

Source: Oklahoma State Legislature

Why is my AC not blowing cold air?
Most of the time the filter is clogged and starving the system of airflow, or the refrigerant charge is low from a leak. A dirty filter makes the coil freeze up, and once that happens you get weak air that isn't cold even though the system is running. Low refrigerant needs a licensed technician, since opening that side of the system legally requires EPA certification. If your filter looks clean and vents are open, the problem is likely inside the system and worth having someone look at soon, especially with afternoons here running near 93°F.
Why is my AC leaking water?
This usually means the condensate drain line is clogged, or the coil has frozen and is now melting. The drain line carries the water the coil pulls out of the air, and algae or debris can block it over time, backing water up into the house. A frozen coil is often caused by low airflow or low refrigerant, and it will drip once it thaws. Either way, water around the unit means something needs attention before it damages the floor or the system itself.
Why won't my AC turn on?
Check the thermostat first, since a dead battery or wrong setting will keep the system from starting at all. If the thermostat looks fine, check the breaker, since a tripped one will shut the whole unit down. Beyond that, the problem is likely electrical or mechanical inside the unit itself. A licensed contractor can test the system and find out which part failed.