Honeywell is the most trusted and widespread thermostat brand in America. Whether you have a classic non-programmable model or a cutting-edge Wi-Fi Smart thermostat, the foundational settings remain largely the same.
However, setting it up incorrectly can lead to skyrocketing energy bills, high indoor humidity, or waking up freezing in the middle of the night. Here is the ultimate guide to understanding and optimizing your Honeywell thermostat settings for your Georgia home.
Understanding the System Modes
Your thermostat acts as the commander of your HVAC system. The "System" button tells the equipment what its main job is right now.
Cool
This mode activates your air conditioner. The system will run until the indoor temperature drops to whatever target number you have selected.
Heat
This activates your furnace or heat pump. The system will produce warm air until the temperature rises to your set point.
Auto
Available on newer models, Auto mode allows the thermostat to automatically switch between heating and cooling to keep your home within a specific temperature range. It's great for unpredictable spring or fall days in Georgia.
Em Heat
Emergency Heat is only found on systems that use a Heat Pump. You should never use this setting unless your outdoor heat pump is completely broken or frozen over. It bypasses the efficient heat pump and strictly uses expensive electric backup strips.
The Fan Setting: ON vs. AUTO
Perhaps the most misunderstood switch on any thermostat is the "Fan" setting. This switch controls the indoor blower motor (the part that pushes air through your vents).
- AUTO: This is the setting you should use 95% of the time. When set to Auto, the fan only turns on when the AC is cooling or the furnace is heating. Once the target temperature is reached, the fan shuts off.
- ON: When set to ON, the fan runs continuously 24/7, regardless of whether the system is actively heating or cooling.
Why "AUTO" is better in Georgia: In humid climates, leaving your fan set to "ON" is a terrible idea. When the AC stops cooling, the indoor coil is still wet. If the fan keeps running, it simply blows that moisture straight back into your house, making your home feel incredibly sticky and clammy.
Programming a Schedule
If you have a programmable Honeywell thermostat, utilizing the daily schedule feature can save you up to 10% a year on heating and cooling costs. The standard Honeywell schedule is broken down into four daily periods:
- Wake: The time you usually get up. Set this to a comfortable temperature (e.g., 72° in summer, 68° in winter).
- Leave: The time you go to work. Let the house get warmer in the summer or colder in the winter (e.g., 78° in summer, 62° in winter) so you aren't paying to condition an empty house.
- Return: The time you get home. Have the system return to your preferred comfort temperature about 30 minutes before you walk through the door.
- Sleep: The time you go to bed. Many people prefer to sleep slightly cooler, so adjust accordingly.
Troubleshooting Common Issues
If your thermostat isn't behaving properly, before you assume your AC won't turn on ever again, check these common thermostat-specific issues:
1. The Screen is Completely Blank
A blank screen means the thermostat has lost power. If your model has a battery compartment, pull the faceplate off the wall and replace the AA or AAA batteries.
If it doesn't take batteries (or if new batteries don't work), you have a hardwired electrical issue. Check your main electrical breaker panel to see if the furnace breaker is tripped. If the breaker is fine, you likely have a blown 3-amp fuse on your indoor control board or a dead furnace transformer.
2. The Screen Says "Wait" or is Flashing
Don't panic! This is a built-in safety feature. The thermostat enforces a 5-minute delay after the system shuts off before it allows the compressor to restart. This prevents the system from "short-cycling" and blowing a fuse. Simply wait 5 minutes and it will turn on.
