Air Conditioner!!

O.K. - so here we are at the beginning of the scorching weather ( emphasis on the beginning part) and yet again for the fourth year in a row our air conditioner is not working correctly. The first summer we were in this house we had it constantly set at 69 degrees cuz we both like it cold - and it was fabulous! Ever since then it's been nothing but problems and each summer we have someone come out and check it, and of course they do a complete inspection, clean the air ducts, and top off the frion, which means of course hundreds of dollars spent in a matter of 17 minutes. We've poured enough money into fixing this air conditioner that we could've saved money if we just would've bought a new one right off the bat. Boy, are we dumb huh? Anyways, so here we are June 25th and it's a whooping 86 degrees outside and 79 degrees inside, even though the air conditioner is turned to 74 degrees. I can't imagine what it's going to be like when the weather gets into the 100's - and - oh it will, all too soon I'm afraid. So - do we sweat it out? Do we get some other lovely (oh - and they are lovely) AC fixer to come and check it out yet again probably to just do exactly what they did the past few years (which was NOTHING - dimwits)? Or do we bite the bullet and spend my child's college fund on a new air conditioner? Choices! Choices! You can't tell I'm six months pregnant, entering the scorching weather and am a little on edge with the whole ordeal can you? GOOD!! Life is grand!