Split A/C with gas heat...
Compressor died and I had it replaced by a 'Carrier authorized service' company. Their work was not the greatest - no nitrogen purge, no filter/dryer, no thermometer to do a sub/cool check - did it by setting the pressures to 'what they always set them at', regardless of temps, based on 'years of experience'. From the age of the tech, those years couldn't have been more than 2 or 3.
I contacted the owner who came out to inspect the work and said it was fine.
The system ran well for about two weeks and then started falling off. Register temps 5 feet from the evap were only 5 degrees cooler than room temp.
I called the owned back out and he declared the evap coil partially blocked. Said it was old and needed to be replaced. It is 10 years old, but has very little use, under 1,000 hours. He said it was completely unrelated to their earlier work. I suspect that it is indeed blocked, and probably with crud from the burnt out compressor (or their soldering) that didn't get filtered out by the non-existent filter/dryer. But I was not able to get anywhere negotiating with them. They quoted a fairly high number to replace the coil.
I plan on getting a second company to inspect the situation. But a few questions so I can be prepared.
1. Is there any way to confirm that the coil is really plugged up?
2. Is there a way to unclog it if it is plugged up? I realize that there are some pretty small tubes distributing the freon at the coil, but I would also think the piston would be the smallest restriction and a natural place to get a log jam.
3. Is there something else that woud cause the decreased temps? Well, knowing a little about A/C I know there could be a whole bunch of causes, but what might be the most likely, given that they replaced the compressor?
Bill in Phoenix