Harper Revell Heating and A/C (HRHAC) was the contractor who installed my two heat pumps in my home, the first in 2006 and a second one added 2008. HRHAC consequently has been the company whom I called for routine maintenance of, and problems with, either heat pump. Last month, I called HRHAC and asked them to schedule a technician to come out and check my smaller (1.5 ton) heat pump which was not cooling the two rooms (575 sq ft) that it normally cools effortlessly. The technician came out a week later as scheduled. He and quot;checkedand quot; the outside component and the fan component up in the attic - all within 30 minutes. He informed me that the heat pump appeared to be working fine, including having enough coolant. When I asked him why it was not cooling properly as before (bedroom temp at 8PM was 80 degrees), all I got was a shoulder shrug and a suggestion to keep the door of the stairway leading to the other room open. I tried that and it made the problem worse. After spending over $1000 on an indoor air conditioner and a solar-powered roof vent, and after finding my electric bill was 30% higher than normal because this heat pump kept running 21 - 22 hours out of every 24 hours, I decided to call Benson's Heating and A/C. Benson's Heating and A/C technician arrived as scheduled. She was knowledgeable, courteous, and thorough. Although she quickly identified the problem (low coolant), she checked every component of the heat pump. She added 5 lbs of Freon and felt that it should resolve the problem. If not, she informed me what the next step would be in identifying the problem (all be it less likely). Amazingly, the heat pump has been working perfectly for the past week. I will never rely on Harper Revell Heating and A/C again.