The idea that you should never turn your air conditioner off stems from the energy efficiency principle that it takes more electricity to cool down a hot, humid home from scratch than to maintain a steady temperature. When you turn the AC off for long periods, heat and moisture build up inside the building materials, requiring the system to run continuously for hours at maximum capacity to restore comfort. However, this does not mean you should never turn it off for maintenance or when adjusting temperatures while away; rather, leaving it running on an optimized smart thermostat schedule or raising the temperature setting when away is generally recommended over completely shutting it down daily.
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