HVAC Repair in Farmington, MO
Homes here need heat from October through April and cooling from June through September. If your system quits, tell us what it's doing and a licensed contractor who covers St. Francois County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work a year for your system
Furnaces here run October through April, and on nights that average 25°F they cycle on and off for hours at a stretch. Every one of those starts puts wear on the igniter and the ignition control. When one finally gives out, the furnace stops firing and the house goes cold.
Summer asks the same of the air conditioner, four months of afternoons near 86°F. That kind of load falls hardest on the capacitor and the outdoor fan motor. Most homes here heat with electricity, so when a storm knocks out power, the whole system goes down with it, not just the thermostat. St. Francois County has seen 54 damaging wind events and 7 winter storms over the past ten years, and in 2024, close to a fifth of Missouri households lost power for at least 24 hours. A system already worn from the swing between summer and winter is the one least likely to come back on its own.
- 7 months
- October through April, your system heats
- 4 months
- June through September, it cools
- 25°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
- Why is my heat not working?
- Start with the thermostat. Make sure it's set to heat and the set temperature is above the room temperature, since a thermostat bumped to cool or a dead battery will stop the whole system cold. If that's not it, check your breaker panel, because a tripped breaker will shut the furnace down with no warning at all. Most homes here heat with electricity, and a power blip during a storm is enough to trip a breaker without anything being wrong with the furnace itself. If the breaker holds and the thermostat looks right, the igniter or a safety switch may be keeping the furnace from starting, and that's a job for a contractor to check.
- Why is my system running but not cooling the house?
- Check the filter first. A filter clogged with dust blocks airflow across the coil, and when air can't move past it the coil can ice over and stop cooling the house even though the blower is running. Next check the outdoor unit. If the fan outside isn't spinning or the unit is packed with leaves and grass clippings, it can't release the heat it's pulling from inside, and the air coming out of your vents will run warm no matter how long the system runs. If the filter is clean and the outdoor fan is turning, the refrigerant charge may be low, and that's something only a contractor can check and correct.
- What can I check before calling for HVAC repair?
- Check the thermostat settings, the batteries in it, and the breaker for the system before anything else. Each one takes a minute to check and each one can stop a furnace or an air conditioner cold on its own. Next, look at the filter and swap it if it's gray or clogged, since restricted airflow can look like a much bigger problem than it is. If the outdoor unit is covered in debris or the vents inside are blocked by furniture, clear them. If none of that brings it back, a contractor will need to look at what's inside the cabinet.