HVAC Repair in Chattanooga, TN
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 Hamilton County will get in touch.
Tell us about the job
It takes about a minute.
Twelve months of work, in a place that keeps losing power
Your system runs all year in Hamilton County. Heat from October through April, cooling from May through September, with no real break between them. Winter nights average 32°F, cold enough that the furnace cycles on and off for hours at a stretch. Summer afternoons average 87°F, and the AC answers back the same way, the compressor kicking on and off as the house heats up again.
The harder problem is what happens when the power itself gives out. Hamilton County has logged 31 winter storms and 117 damaging wind events over the past ten years, and one in five Tennessee households lost power for a full day or more in 2024. A furnace or AC unit that loses power mid-cycle does not always come back on by itself. If your system is dead and the power is on, or the power just came back and nothing is happening, that is worth a look before you assume the worst.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 32°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. Make sure it is set to heat and the setpoint is above room temperature, since a bumped switch or dead battery is an easy thing to miss. If the thermostat looks right, check the breaker for the furnace and, on a gas furnace, make sure the switch on the unit or the one that looks like a light switch nearby is on. Most furnaces built in the last few decades run on electricity to power the blower and ignition even if the heat itself comes from gas, so a power problem can stop a gas furnace cold. If everything is on and you still have no heat, especially on a night near freezing, a contractor needs to look at it.
- Why is my system running but not cooling the house?
- Check the air filter first. A filter clogged with dust chokes off airflow, and when that happens the coil inside can ice over and stop cooling the air even though the blower keeps running. Next, look at the outdoor unit and clear away anything blocking it, leaves, grass clippings, a fence panel too close. If the filter is clean and the outside unit is clear but the air coming from your vents is not cold, the system likely needs a contractor to check refrigerant and the coil itself.
- What can I check before calling for HVAC repair?
- Check the thermostat settings and its batteries first, since a dead battery or a setting bumped to the wrong mode causes real problems that have nothing to do with the equipment. Check the breaker panel for a tripped breaker, and on a gas furnace check that its power switch is on. Check the air filter and replace it if it is dirty, since restricted airflow affects both heating and cooling. If the outdoor unit is involved, make sure nothing is blocking it. If you have gone through this and the system still is not working right, a contractor will need to diagnose it further.