How low can you go with that thermostat? Here’s betting that on a really hot day, you’ve been tempted to find out, jamming it down as far as it seems to go — maybe as far down as the low 60s. Or, you’ve thought that by doing so, you can make the house cool off faster — which you can’t, because it won’t.

What you can do by cranking the thermostat down past 68 is freeze up your HVAC system, ruin your compressor and then have to spend lots of money repairing or replacing it. So don’t do it.

The fact is, your air conditioner was not designed to run too cool.

Why Your AC Can’t Refrigerate Your Home

It’s just the way the average residential air conditioner is designed. The equipment and the refrigerant work together to achieve what is considered average comfort for a particular-size home, say between the mid-60s and the 80-degree mark. For those who’d like it cooler, you may need to look into installing a refrigerated room in your house — seriously. Your AC is not a refrigerator, and trying to make it behave like on will result in disaster.

Running the thermostat too low will cause the coils to freeze rather than do the job they were designed for. The coils are where the moisture from the air in your home evaporates. After evaporation, it is sent away in the condensate drain, thus helping to dehumidify the home during the cooling process. If the coils freeze up, heat transfer can’t take place and the compressor, which is located in the outdoor unit, may be damaged.

What’s more, even if the freezing doesn’t kill your AC, it will prevent it from cooling your home. You’ll be wasting energy and possibly damaging your HVAC system as you do it.

If you freeze your coils by jamming the thermostat down too low, turn the cooling off but leave the fan on and allow the ice to melt.

For more on how not to run the AC too cool, contact Mowery Heating, Cooling and Plumbing of Indianapolis.