for the best performance and maintenance of your system try running the fan constantly (switch from auto to on). You will find the elimination of the hot rush of air. Circulation of the cooled air continues after the thermostat shuts off the compressor (when it reaches the set temp), hence extends the time until the thermostat kicks the compressor on for the next cooling cycle.
Many folks do not do this because they think it adds cost. Well it does but no more than leaving lights on in the house....which can be out weighed by the benefits.
Others will be concerned that the motor will wear out....very unlikely.
If you have ceiling fans they should be running 24/7 as well. You will not wear these fans out and the cost is insignificant to keep them running.
Doing the above results in a much more consistent temp throughout the house....try it. It will also be filtering more of the air you breath as well.
The fans in our 8 year old home have never been turned off.
btk
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