HVAC Repair in Cumming, GA
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 Forsyth County will get in touch.
Tell us about the job
It takes about a minute.
Twelve months of work, in both directions
Your system doesn't get a break in Forsyth County. It runs from October through April to keep the house warm, then May through September to keep it cool. That's every month of the year asking something of it.
Winter nights here average 33°F, cold enough that the burner or heat pump cycles on and off through the night, and each cycle wears on the igniter or the parts that start it. Summer afternoons average 86°F, which means the compressor is working hard for five straight months, and a low refrigerant charge or a struggling capacitor shows up as a house that won't quite cool down. Add in the storms, 48 damaging wind events over the last ten years, and the outdoor unit takes a beating too. Most homes here heat with gas, so when the power goes out, the furnace stops with it. In 2024, close to a third of Georgia households lost power for at least a day, long enough for a house to go cold or the heat to stop being the only broken thing.
- 7 months
- October through April, your system heats
- 5 months
- May through September, it cools
- 33°F
- the average winter night it heats against
- 86°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
A new furnace and air conditioner would cut about $180 a year off heating and cooling for a typical Forsyth County home.
Estimates for a typical Forsyth County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Georgia fuel prices and NOAA climate normals. Your home will differ.
Repair makes sense when one part has failed.
Replacement makes sense when the furnace's heat exchanger is cracked, the air conditioner's compressor has failed, or repairs keep coming.
Georgia requires HVAC contractors to hold a state license.
The State Construction Industry Licensing Board is the body that licenses HVAC contractors in Georgia. That license belongs to the contractor, not to any single job, so the same license covers your repair and the next homeowner's.
For a heating and cooling repair, that state license is what stands behind the person working on your system. It is a license, not a registration where someone just filed paperwork, and not a rule that depends on which county you live in.
Source: Georgia Secretary of State
- Why is my heat not working?
- The most common cause is the thermostat, the power supply, or the igniter, and a contractor checks these first. If the furnace runs on gas, the pilot or igniter can fail and stop the burners from lighting at all. If nothing comes on at all, check the breaker and make sure the thermostat is set below room temperature and switched to heat. Winter nights here average 33°F, so a furnace that will not light needs attention the same day.
- Why is my system running but not cooling the house?
- Warm air blowing from the vents usually means the problem is at the outdoor unit, not the fan inside. A dirty air filter or a coil covered in ice can block airflow enough that the house never cools, even though the blower runs. If the outdoor unit is not running at all while the indoor fan works, the compressor or a component that feeds it power has likely failed. Check the filter first, since a clogged one is the easiest cause to rule out yourself.
- What can I check before calling for HVAC repair?
- Start with the thermostat. Make sure it is set to heat or cool as needed, the batteries are good, and the setting is actually past room temperature. Check the air filter next and replace it if it is gray or clogged, since a blocked filter can cause both weak heat and weak cooling. Look at the breaker panel for a tripped breaker, and if the outdoor unit is silent, check that nothing is blocking it. If the system still is not working after these checks, a licensed contractor can diagnose the rest.