Aire One West Heating & Cooling

Purchased furnace and A/C in 2007 from Aire One. No problems with furnace to date. I decided to go with the extended 10 year warranty as the salesman Alex indicated I would benefit from a locked in price for the full 10 years. Near the end of year two I went to pay my yearly fee to maintain my warranty and was told that the price had increased substantially. I explained to no avail that the salesman assured me that my yearly fee was locked in at the same price. Due to this much higher unexpected cost I refused to continue with the warranty. The third summer I noticed the A/C was having difficulty keeping up on warm days and would often run all day and into the night without shutting off. The inside temp would also increase 3 or 4 degrees above the set point on the thermostat. The first two summers it had no problems keeping up even on very hot days. For years five & six I called a A/C repair technician who determined that the refrigerant pressure was low. He tried unsuccessfully to find a leak in the system. He charged the system back to it's normal operation pressure but within a few weeks it was running steady into the night and unable to keep up again. A few days ago I contacted Aire One for service. The technician arrived promptly and was very friendly and informative. He said that the refrigerant suction valve needed to be replaced for a cost of $1,050 but he recommended replacing the entire A/C unit for $3,000 as the extensive work necessary for this repair would likely degrade the A/C causing it to be inefficient and possibly shorten it's life. The Aire One technician indicated the cause to be the fault of the Aire One installers as they overheated this inline valve while soldering the line, which caused the valve to fail. Now I'm faced with having an 8 year old A/C replaced because of the shoddy workmanship of the installer. Because of the nature of the problem I feel that Aire One should pay at least 1/2 the cost to have this unit repaired or half the cost of a new air conditioner. Needless to say, I will be purchasing a new A/C elsewhere.