I replaced my old unit with a Rheem 4 ton 16 SEER unit, after some electrical problems the unit seems to be working fine. My concern how is the unit never needs to run on the 2nd stage to cool the house down. During the day when it's 97 degrees outside and high humidity. I will set the thermostat at 76 degrees and 45% humidity. The unit will run for around 25 mins on and 15 mins off. It stays on the 1st stage and never needs to go to the 2nd stage. It keeps the house at 76 degrees and 45% humidity. In the morning when its 80 degrees outside and very high humidity the unit will run for around 15 mins and be off for around 1 hour, and keeps the house at 76 degrees and 45% humidity. Everything seems to be great except for those short run times and long down times. What do you guys think, should I worry?