Having trouble w/car stalling out during idle at stop lights etc. when A/C is on

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Have had vacuum checked - fine. Computers codes coming back okay as well, HOWEVER, issue presented after engine bearings replaced & new battery installed. Took car in for yet another opinion and had to have battery replaced again & had brakes and tires done at same time - problem is still present. Because I have a model that presents issues w/the check engine light ABS light (they have been on since I purchased vehicle & 3 batteries ago over a 4 yr span!) - battery light on as well, but everything is now fine, except I can't run the A/C and also expect car to stay on if I come to a complete stop. I live in FL - have two kids, and have put over $3000 into this thing in these repairs alone (not counting regular maintenance and up keep. Multiple different mechanics and repair shops all stumped - and I'm at my wits end, any help is appreciated!