Hey guys this is my first post.
I have two Frigidaire a/c units on my home. A 3 ton and a 4 ton each using Copeland scroll compressors.. Each cooling seperate parts of the house. These were installed when I built the house in 1999. They have worked great until this last summer. The 4 ton unit has run low on R-22 a couple of times. Froze up the first time, not as bad the second because I was monitoring the gas pressures every couple of weeks with my gauges. I have over the winter looked for this leak and come to the conclusion that its the evaporator coil. The reason I think this is because I have an electronic R-22 leak detector (borrowed from work). The detector goes nuts when I take off the panel and put it up close to the evaporator coils. Does this sound like an early failure of an evaporator core? 11 years? I ask people and I always get "Frigidaire stuff is cheap" "be happy you got 11 years service". Is this the general concensus of the forum? My 3 ton unit has never given me a smudge of problems. Works like a champ.
What could have caused this? Moisture in the system creating acid?