My sincerest apologies if this is a repeat question... I've done some searching in your site but there is an over abundance of info and I'm a greenie in this field... learning as I go...
to give you some history to my question...
I have a 13 yr old system that is a (i think) 2ton 10seer unit. its a commercial grade unit that was put in cookie cutter homes in '98.
last year we had trouble with the a/c and i called a tech to come out... he charged the line as my coils in my handler were freezing over and cold air wasn't coming out of my vents... worked for alittle while... and then it went back to what it was doing, freezing over and no cool air. Got a different guy to come out, do the dye test found a leak but it was in the evaporator coils, that entire piece got replaced. got it recharged and it was working great!
heater worked great over this past winter.... and yesterday when I turned on the a/c, the compressor outside turned on but no air handler. I replaced the batteries in the t-stat thinking that might help..... let the compressor run a couple of mins, went outside and the lines coming off the compressor started to frost up... (keep in mind it was 85 yesterday)
I'm at a loss as to what can be wrong... will a simple replacement of the t-stat do it or do i need to call a tech to come out and see if its the motor or something else?
any advice is welcome. thanks!