The make and model of the indoor and outdoor units, voltage, etc are helpful plus any info on the thermostat. When you changed the transformer, was it the same size in VA as well as the voltage?
OK I'll get it to you ..I'm heading to bed been up all day ..got 2 hrs yesterday before work last night off at 5 got 3 hrs today I feel as if I have been drinking all day lol ..I'm getting old I use to could work day and night sleep 3 4 hrs lol no more I'm done in about 10 total now lol