Hi, I'm Douglas and I am here to help you resolve problems with your heating and cooling equipment.
Your tech needs to tell you why you need a new one. 7 years is hardly the life of a AC system. I mean to say, is it leaking, does the compressor have a bad valve, did the load change and you need more capacity.... Did he actually check the output capacity? (most techs dont have a clue how to do this). Did he measure the airflow? (another lost art). I am wondering if this particular tech is either in over his head or on commission. I dont know him from Adam but I suspect it might be worth getting another set of eyes on it.