Brand new thermostat. In the heat of the day of South Florida, the air conditioner turns off before reaching the desired temperature. The thermostat is asking for the AC to be on, but it remains off for about 15 minutes. Then it will come on for 15 minutes, off for 15, on for 15 and so on until the evening hours where it will run longer and eventually catch up to the desired temp. Each time the AC turns off, the thermostat is asking for the AC to be on. Temp difference is at least 5 degrees. Tried numerous thermostats, same problem. Had two different guys look at my ac and they said it was ok.
Hi, thermostats is not problem , it's asking for cooling when it should, it's your condensing unit outside, if mechanics said, system is o/k. then it's location of condensing unit, check location of your condensing unit, in relation to direct sunlight, condensing unit best location is always a cool place, preferable away from direct sunlight, check to see, when unit is doing that, if it's expose to direct sunlight, that could be your problem, direct sunlight for long periods could cause the high pressure & temp. controls malfunction. or maybe system is not fully charge with freon, double check freon charge. if direct sunlight is your problem, build a shade or change location of condensing unit, good luck.
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Been doing research and am suspecting a bad capacitor or time start relay. Could it be one of those??
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