I have a 3 1/2 year old 4 Ton Trane XL13i A/C unit. About 2 months ago it had trouble turning over on startup. My servicing dealer came and installed a start assist kit. This seemed to help. Last Sunday the compressor started to fail towards the end of the day. It would not run all night and then it would come back on in the AM. The dealer put a new compressor in. Guess what? Same problem that night and 3 nights since. Also, the unit does not put out cold enough air. It runs all day continuously without cycling. Obviously it was not the compressor. Tech was out last night and the freon line was silent, the coil was dumping water and the compressor was red-hot! He had to run cold water right on the compressor for 30 mins just to cool it off so it would run again while he was there. Now he thinks the issue is the metering device in the coil and he thinks an indoor coil replacement will solve the issue. But, there is no way to really test the metering device. He is 80% confident in this solution. Based on the history here, I am not confident at all. It just feels like a trial and error guessing game and I am extremely frustrated. I have an outdoor unit that has been taken apart once, had a start kit added, had the 410A line drained already once. To replace the coil they will need to drain it again. Also, the new compressor has been running red-hot the past 3 nights, so I am worried about possible damage to that as well. I just feel like I have a real junk-yard, patch-work system out back. I have been in contact with Trane corporate and I am trying to push them to replace the indoor coil and the outdoor unit. This is the hottest week of the year and there is no progress from my dealer here. They need 2 more days to try and diagnose the problem and Trane won't make a replacement decision until the diagnosis is complete. It's a real Catch-22.
Can anyone provide insight into this or any advise?
Thanks, David