Why Your Furnace Keeps Turning Off in Fayetteville or Peachtree City (and How to Fix It)
December 2, 2024
Suppose your furnace keeps turning off every few minutes in Peachtree City or Fayetteville, GA. In that case, you’re likely dealing with a short cycling issue—something our HVAC team at John’s Heating & Cooling sees every winter in neighborhoods like Centennial, Smokerise Crossing, The Canoe Club, or Lake Redwine. Whether you live in Sharpsburg’s Persimmon Creek or Newnan’s SummerGrove, short cycling can waste energy, wear out your system, and leave you uncomfortable when temperatures drop.
Here’s what may be causing your furnace to shut off early—and how to fix it.
1. Furnace Overheating Due to Restricted Airflow
A furnace overheating often causes short cycling. Overheating forces the system to shut down as a safety measure. This problem is prevalent in homes around The Landings and Braelinn Village when air filters are clogged or vents are blocked by furniture or rugs. Dirty air filters are the #1 cause. Don’t underestimate how fast that can lead to performance issues.
Fix it: Check and replace your furnace filter monthly during peak use. Make sure no furniture is blocking return or supply vents. If you smell something burning or notice your blower motor is not running, turn the system off and call us for service before it damages the heat exchanger.
2. Dirty Components Causing Shutdowns
Furnace components like the blower motor or heat exchanger can collect dust and debris, especially if you haven’t had seasonal maintenance. We see this often in homes near Robinson Road or McIntosh Trail, where older units haven't had annual service. Dirty internal parts can trap heat and trigger the limit switch to shut down the furnace too early.
Fix it: Schedule a furnace tune-up to clean your system and reset performance. We recommend our local customers in Fayette and Coweta County schedule service every fall.
3. Thermostat Is Misreading Temperatures
Inaccurate readings from an old or poorly located thermostat can cause your system to shut off before it reaches your desired temperature. In homes around Sharpsburg and southern Newnan, we often find thermostats placed too close to vents or windows, which skews readings.
Fix it: Calibrate your thermostat, or better yet, upgrade to a smart thermostat for consistent control. We install and configure thermostats for homes in subdivisions like Wynnmeade, Whitewater Creek, and Maple Creek Farms.
4. Furnace Is Too Large for Your Home
If a contractor installed an oversized furnace, it may heat your home too quickly and then shut off, only to repeat this cycle. This is inefficient and hard on your equipment. We’ve replaced many improperly sized systems in newer homes in areas like The Gates in Fayetteville or Madras Parkway in Newnan.
Fix it: A heat load calculation by our team can determine if your furnace is the right size. If it’s oversized, a properly matched system will give you better comfort and efficiency.
Trust a Local Heating Expert
At John’s Heating, Cooling & Appliance Repair, we’ve helped hundreds of homeowners in Peachtree City, Fayetteville, Sharpsburg, and Newnan solve heating issues fast. Whether your furnace is overheating, short cycling, or needs replacing—we’ll give you honest answers and fast, affordable repairs. With 24/7 emergency service and over 28 years of experience, we’re the trusted HVAC company for South Metro Atlanta.
📍 Need help right now? Call 678-603-7775 for same-day furnace repair in your area.
