I have a 990 square foot condo with a 2 ton American Standard Allegiance 11 (Model: 2A7A1024A1000AA, manufactured 8/2004).
I called a local HVAC contractor and he come out and diagnosed the problem as a "weak compressor." The compressor was under warranty so he ordered a new one. At that time he also replaced my capacitor as it appeared to have overheated (he showed it to me and it had a suspicious looking discolored spot at the base) and he cleaned the coils on the condenser.
Today the tech returned to replace the compressor and filter and to charge me for his services. Now that he is finished....it is still not that cold in my apartment.
I took some temperature readings with a digital kitchen thermometer just to get a handle on things...
Indoor supply air temperature: 84.3
Diffuser air temperature: 76.5
Outdoor air temperature: 89
Condenser output air temperature: 102
Suction line surface temperature: 48
Pressure line surface temperature: 92
Should I get a second opinion? Should this problem be so hard to fix? Is there anything else I should check? What should I do next?
As an additional note: The original compressor had a 10 year warranty, but the tech told me that the replacement part only has a one year warranty. Is this standard practice? Because it seems strange to me...