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Discussion Starter #1
OK admit I am a dork when it comes to AC units, but how can I tell if my system has R12 in it or 134? A friend told me to look for tags or stickers that say 134 and none can be found. The 2 fittings it has on it are described as this: Each has a cap on it that has threads on the inside. Once you remove the caps then the fitting looks pretty much like a valve stem on any old tubeless tire rim. It too, has threads on the inside of the stem. Like I said it looks like you could use a needle tool and unscrew it just like a tire valve stem.
I have pictures I can send
What else do I look for?

I am thinking it is R12, if so, can I just add to existing with R12 or do I need to evacuate the whole system? The unit works and blows, just not very cold, esp here in Texas now with the 100 degreee days!
 

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High Mileage by interdynamica with leak sealer uses the old R12 lube with the R13 refrigerant...so mixes with any and all r12-r13 so stick that adapter on there and charge her up
 

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just do a search for it or better yet go to the tire dept at wall mart and read the can...or a auto shop

It will say on the back of the can compatible!

Its a silver can with a odo on the front rolling to 50000.1
 
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