HVAC Repair in Rolla, 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 Phelps County will get in touch.
Tell us about the job
It takes about a minute.
Rolla runs its system almost year round
Heat runs October through April here. Cooling takes over for May through September. That leaves almost no season where the system sits idle.
Winter nights average 25°F, cold enough that the furnace cycles on and off for hours at a stretch, and each cycle puts wear on the igniter and the blower motor. Summer afternoons average 87°F, which keeps the air conditioner's compressor under load all day. Most homes here heat with electricity, so a breaker problem or a power outage can take the whole system down at once. Phelps County has seen 56 damaging wind events and 10 winter storms over the past ten years, and statewide almost one in five households lost power for a full day or more in 2024. Most systems restart on their own once power returns, but a part already worn is more likely to fail right after.
- 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?
- The most common reason is the igniter, the flame sensor, or the thermostat losing its setting. Check that the thermostat is set to heat and the batteries are good, and check the breaker and any switch that looks like a light switch near the furnace. If the furnace runs but no warm air comes out, or it won't start at all, a contractor needs to look at the igniter or the gas valve. With winter nights here averaging 25°F, it's worth getting this checked the same day rather than waiting.
- Why is my system running but not cooling the house?
- If the outdoor unit and the indoor blower are both running but the air coming out isn't cold, the most likely cause is a dirty air filter, low refrigerant, or a frozen coil. Start by checking the filter, since a clogged one chokes off airflow across the coil and can make the whole system struggle. If the filter is clean and you still get warm air, or you see ice on the outdoor unit or the indoor coil, that points to a refrigerant leak or airflow problem a contractor needs to diagnose.
- What can I check before calling for HVAC repair?
- Check the thermostat first. Make sure it's set to heat or cool as needed and that the batteries aren't dead. Check the air filter and replace it if it's gray or clogged, since a blocked filter can cause both weak heating and weak cooling. Check the breaker panel and any disconnect switch near the outdoor unit or furnace, since a tripped breaker can look like a much bigger problem. If those are all fine, a contractor will need to look at the equipment itself.