I have a 14 year old Carrier 38CKC060 in the Phoenix AZ area. We had is serviced for the summer and the tech is recommending we replace the unit. We were told the compressor is rated for 19 amps and is actually pulling 30 (with an outside temp of 76 degrees) and that there is a rattling noise that is indicative of the compressor failing. I asked if it would be worthwhile to replace just the compressor and he stated that they were no longer made, and that price of the R22 means that it would be better to just replace the whole system. I have noticed that several of our neighbors have replaced their units in the last few years.
So my questions are
1) Do the amp values sound right, I downloaded a spec sheet and cannot find the 19 amp figure he is referring to, I get a value of 8.97 rated load amps from the sheet for the compressor.
2) Also, the tech did not go up the the attic at all, he just looked at and cleaned the compressor and the housing it sits in. Should he have gone up there?
3) Can just the compressor be replaced? With the system being 14 years old is it worthwhile or should I look into getting the whole system replaced at this point?
4) Is it worth replacing just to get a more efficient unit.
The house is 2024 ft sq, and we keep the heat at about 72 in the winter and the AC at 80 to 82 in the summer.
I don't know much about HVAC but do have some technical knowledge, I am a fire alarm tech by trade.
Thanks in advance,