So about a month or so ago, I noticed my inside air temp was a couple of degrees warmer than what the thermostat was set to. Terrific. So a company comes out and checks everything and it is low on refrigerant. My house is exactly 5 years, 10 months old. I have 2 Carrier systems. The default parts warranty on these is 5 years. IF they would have been simply registered.... they would have a 10 years parts warranty. Were they ever registered by the original installer or builder? Of course not. So the company comes back and shoots a UV dye into the system and comes back a few days later with a black light. The evaporator in the air handler is toast. It looks like is has been sitting on the Titanic. They quote me $2000 to fix it. Thinking this is highway robbery, I call another company and they quote me $2800 to fix it. The list price of the evaporator part is $1250. (Although system #2 is not low on refrigerant, its evaporator visually looks much worse.) I could get replace the whole damn system with a top of line Goodman, higher SEER rating for $6000. So $4000-$5500 to fix both units or $12,000 to have 2 fresh installs. So I called my builder. I explained that I realize things breaks, but I felt like I was taking it in shorts because I should have a 10 years parts warranty on these things. Luckily, he is literally building a new warehouse for the original AC company as we speak. So he told me to give him a few days to work on something. He calls back and says the original AC company will cover any part that needs to be replaced and they asked I simply pay for the labor, which they quoted at $550 per unit. And the builder said he would split the labor cost with me. They came out yesterday and replaced both evaporators, some sort of expansion valve, and both dryer filters. My bill is $550. I still cant believe it.