Never heard of that brand. I found the problems start after the condensor gets plugged up. I guess the high temp or heat does something to the oil or refrigerant. I always believed that dupont shoved this stuff down our throats without proper testing. I don't even have the stuff in my personal truck. It runs 401a cools alot better. I am going to try hot shot in it next because of high head pressure with 401a.
I am a bit confused. If it is the oil you are concerned about, why would changing the refrigerant stop the cap tube from clogging up?
"Fighting Ignorance since 1973 (Its taking longer than we thought)." The Straight Dope.
It is my understanding (field rep. united refrigeration) that the residue is a sodium based chemical solidified from a high heat condition.It collects in the condenser and there is no known remedy. I too am plagued with this affliction.
converted several. 134a to 409a since last posting. and yes changing compressors after a captube plug up. Is a good idea. I have found that the original com. does not last a year after cap tube plugs. valves will fail or bearings seize. I always give the option to the customer. Most customers. Do not want to take a chance on the unit failing again and will go with the compressor along with new cap tubes.
That is a good idea about the drier for an accumulator. i have changed captubes to x-valves before and was a pain to get charge right. Without an accumulator. i have used 3/4 tubing as an accumulator before on small systems. Makes them recover faster.
I do agree. r-12 was much better than this stinking 134a. As for why change freons: lower comp. temps, faster recovery and have not had a cap tube plug in any of the systems I have changed over.The most important part is the customer is happy.
I have noticed that Braziallian Tecumseh compressors seem to have oil in them from the factory that makes lots of wax in the cap tube. I have had excellent luck wireing the fan motor to run 24/7 after the repair. Got 5 years on some of the units post repair sor far. No more clogging.