We have warm summer days ranging to 90-94 F in the late afternoon, but cooling to 55 F by 3:00 AM. I usually throw open the windows early in the morning to cool the house to 70 F then shut the windows when the outside temp hits 70. By 4:00 PM the inside temp usually hits 73 and I programmed the AC to come on. The outside temp might be 90 F but the relative humidity is a lowly 15%. There is almost a 20 F difference between inside and outside temps during the late afternoon. I find if I try to set the inside temp lower, to say to 70 F I might get some icing across the condenser coils. Would this be normal? Also, once the outside temp is below 73 I find I might get icing if I tried to get the inside temp to lower than 70 F. I’m wondering if I should have the charge pressure checked. Any thoughts? Thanks.