HVAC Repair in Jefferson City, MO
Homes here need heat from October through April and cooling from May through September. If your system quits, tell us what it's doing and a licensed contractor who covers Cole County will get in touch.
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Cole County runs its heating and cooling almost year round
Your furnace works October through April here, seven months of the year, and on nights that average 25°F it cycles on and off for hours at a stretch. Every one of those cycles puts a load on the igniter and the flame sensor. When one of those parts wears out, the furnace either won't light or shuts itself off partway through the night.
Then summer flips the load onto the air conditioner. Afternoons averaging 87°F from May through September mean the compressor runs long and hard, and that heat is what pushes a weak capacitor or a low refrigerant charge past the point where the system can keep up. 56% of homes here heat with electricity, so when the power goes out, the furnace goes down with it. Cole County has logged 21 damaging wind events and 4 winter storms over the past ten years, and across Missouri, 19% of households went at least 24 hours without power in 2024.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 25°F
- the average winter night it heats against
- 87°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Why is my heat not working?
- Start with the thermostat and the power to the furnace before you assume the worst. Check that the thermostat is set to heat and a few degrees above room temperature, and check that the furnace switch (it looks like a light switch, usually near the unit) is on. If the furnace runs on gas, look at the flame through the sight glass or listen for the igniter clicking. A furnace that won't start at all, especially on a night near 25 degrees, is worth calling in soon since a delay means the house keeps losing ground.
- Why is my system running but not cooling the house?
- The most common cause is a dirty filter cutting off airflow, so check that first. A clogged filter starves the coil of air, and the coil can ice over, which makes the problem worse the longer the system runs. If the filter is clean and air is still coming out warm on an 87 degree afternoon, the system may be low on refrigerant or the outdoor unit may be blocked by leaves or grass clippings. Clear anything around the outdoor unit and call a contractor if the air still isn't cooling.
- What can I check before calling for HVAC repair?
- Check the thermostat first, since a wrong setting or dead batteries cause more no-heat and no-cool calls than an actual broken part. Next check the filter, a dirty one restricts airflow to both the furnace and the coil. Check the breaker and any power switch near the unit, since a tripped breaker or a flipped switch will stop the system cold. If everything there looks right and the system still isn't heating or cooling, that's the point to call a contractor rather than keep guessing.