HVAC Repair in Duncan, OK
Homes here need heat from November through April and cooling from May through September. If your system quits, tell us what it's doing and a licensed contractor who covers Stephens County will get in touch.
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Eleven months of work, with hard swings between them
Your system in Duncan gets almost no rest. It runs heat from November through April, then switches to cooling for May through September. That is eleven months of the year with the furnace or the AC working, and only a short stretch in between to sit idle.
Winter nights here average 31°F, cold enough that the furnace cycles on and off through the night to hold the house steady. Summer afternoons average 93°F, and the AC answers that heat for hours at a stretch, day after day, for five months straight. Wind is part of the picture too. Stephens County has logged 67 damaging wind events over the past ten years, the kind that can knock loose an outdoor unit's wiring or leave debris in the coil. And when a winter storm knocks out power, a furnace with electronic ignition will not restart on its own. It needs someone to relight it or reset it once the power is back.
- 6 months
- November through April, your system heats
- 5 months
- May through September, it cools
- 31°F
- the average winter night it heats against
- 93°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Oklahoma requires HVAC contractors to hold a state license.
The Construction Industries Board tests and licenses the contractor, not the specific repair job. That means the state has already checked the person or business taking on your work, and keeps a record of that license, before they ever show up at your door in Stephens County.
For a repair job like this, that license is what stands behind the work. If the job involves gas lines or connections, a bad joint or fitting is the part that actually puts a home at risk, and the licensing the state requires is what is meant to keep someone unqualified away from that connection in the first place.
Source: Oklahoma State Legislature
- Why is my heat not working?
- Most often it is the igniter or the flame sensor, not the whole furnace. If the igniter has failed, the burners never light. If the flame sensor is coated or worn, the furnace lights and then shuts itself off within seconds because it thinks no flame is present. A dead thermostat battery or a tripped breaker can cause the same no-heat call and cost nothing to fix, so check those first. With winter nights here averaging 31°F, a furnace that will not stay lit needs a contractor licensed through the Construction Industries Board to look at it soon.
- Why is my system running but not cooling the house?
- The blower is moving air, but something is stopping that air from actually cooling it. A dirty filter chokes airflow across the indoor coil, and a frozen coil is a common result. Low refrigerant from a leak will also leave the air blowing but only slightly cool, and that is not something to top off yourself since it points to a leak that needs finding and sealing. Check the filter first. If it is clean and the air still is not cold, the system needs a contractor to look at the refrigerant charge and the coil.
- What can I check before calling for HVAC repair?
- Start with the thermostat. Make sure it is set to heat or cool as needed and the batteries are not dead. Check the breaker box for a tripped breaker, especially after a storm. Then pull the filter and hold it up to the light. If you cannot see light through it, it is choking airflow to the whole system and needs to be replaced. If those check out and the system still is not working right, that points to something inside the equipment, and a licensed contractor will need to diagnose it.