Clearing wax from small cap tube on 134A system

[ckone180]

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?

[breadmn]

out of warranty 409a works great also know man who worked for school system swore by using 22 in 134 systems never had problems

[JRREFRIGERATION]

Well i agree that it wont stop the cap tube up nearly as bad in my experiences. If u take a look at a temperature chart might clear things up better than i describe!

[primmers]

cant we just go back to r-12 and mineral oil??

time to take back what works..
the frog licking barking humping greenies need a good kick in the arse..

[Biblepoet]

cant we just go back to r-12 and mineral oil??

time to take back what works..
the frog licking barking humping greenies need a good kick in the arse..

Preach it brother!!!!!!!

[letsmakesense]

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.
barry

[meoberry]

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.

[meoberry]

On another note. I have had systems that have never been into. That have had plugged tubes. So it is not a poor service issue. Rather. a poor refrigerant issue.

[Dchappa21]

I think you mean receiver not accumulator.... And most of the time plugged or dirt condenser coils will cause your cap tube to plug from your oil cookin.

[darkbeekeeper]

cant we just go back to r-12 and mineral oil??

time to take back what works..
the frog licking barking humping greenies need a good kick in the arse..

That would be to easy of a fix

[Kenscom]

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.

[Tommy knocker]

POE is garbage regardless of refrigerant type.

[ammoniadog]

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.

That almost sounds like a good idea, but wouldn't that just make the condenser get dirtier, and in turn make the cap tube plug up again sooner?

I am thinking of a typical customer here that does no maintenance and only calls when it quits working. For someone who gets regular maintenance, it sounds like a good plan.