Ignoring Your Air Filter
Never Cleaning Fins and Coils
Not Updating (or Setting) Your Thermostat
If you don't have one of these programmable or smart thermostats, the time to upgrade is now! Save money and enjoy more accurate cooling with a simple thermostat replacement, especially if your current thermostat is a couple decades behind the times. Plus: 21 air conditioner maintenance and home cooling tips you need to know.