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Old 07-10-2018, 05:11 AM   #21
shepperd8155
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Originally Posted by flybouy View Post
In my opinion installing a "self piercing valve" is installing another leak. You state that you have a pump and gauges. No offense but do you know how to use them? Just adding refrigerant doesn't fix the leak, it just adds more refrigerant to leak out. Overcharging the system can do more damage. To properly recharge the leak has to be fixed, the system dried out evacuated properly, a proper charging valve installed (a schrader valve welded into the line,) and then a proper charge with the proper amount of oil for the system. On small self contained systems the amount of charge is critical and a few ounces under it won't cool and few over it will destroy the compressor. It's really not a DIY project in my opinion.

Moving forward, does anyone know of reliable certified repair persons in the Nashville Tennessee area? Thanks for any help.
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Old 07-10-2018, 06:33 AM   #22
JRTJH
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Originally Posted by shepperd8155 View Post
Moving forward, does anyone know of reliable certified repair persons in the Nashville Tennessee area? Thanks for any help.
Any certified heating/cooling repair service has the tools, expertise and ability to work on/repair an RV air conditioner. The problem is finding someone that is willing to do the work. Most make a living with larger systems and aren't interested in repairing a small air conditioner. That's why almost all window units are now "disposable" and built the same way as RV units.

Finding someone who is willing to climb on the roof of an RV, work for an hour diagnosing a Freon leak, locating and repairing the leak (without damaging the RV roof) charging for 4 ounces of Freon, a Schrader valve and then having the hassle of every time the RV is towed, getting a complaint call that the system is broken again..... It's hard to keep the customer complaints down with that kind of repair.

So, your problem is not in finding someone qualified, but someone willing to do the work. Even most RV service companies will just "call it bad" and change it out rather than dig into repairing a "non-repairable" air conditioner.... YMMV
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Old 07-11-2018, 06:29 PM   #23
theboneskes
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here is refrigerant... you dont need a license to buy 410a. You do have to have a license to buy R22 though... LOL



https://www.ebay.com/itm/R410a-refri...nd!43123!US!-1


Scale


https://www.ebay.com/itm/220-lbs-Ele...AAAOSw8HBZNh8D



The best bet is to evac the system, pull a vac and recharge to factory amount, over charing is worse that under charging! The split temp (temp between room air and discharge air) should be when properly charged between 18 and 22 degrees. Of course once the ducts lower in temp.


Self piercing valves arent the best in the whole world, but they work and have used them plenty of times!
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