Duo Therm 135000 and 15000 Roof Top A/C

[Bill3211Me]

Both units are working but not as they use to. Has anyone tried to use a piercing adapter to recharge the units.

[Bill3211Me]

Looks like a great article Chris. Getting ready to print and read.

Thank You,
Bill

[Bill3211Me]

Just a thought on how to save some money. They both still work OK for a 02 Class A. Thank you for your input.
Bill

[dougrainer]

Piercing(Tap) are used to access the closed system to allow you to recover and drain the coolant. Once that is done you solder in regular valves. Leaving a Tap valve on the copper will eventually leak as the copper will slowly smash and the rubber seal will start to leak. Some will not leak if installed correctly. But most are not installed correctly. It is highly suspect that BOTH units would loose coolant. When you DO have a leak, the amount of coolant to even cool marginally will be gone in less than a month if not completely gone. They only hold about 16ozs of Freon/410. Doug

[Chris_Bryant]

Yeah- people who wind up replacing them in short order. Try cleaning them first.
I wrote a tune up article a while back- Tune up your A/C- forgive the formatting- RV.net lost it, so archive is it now.