Found this tid bit of info on the can of Canadian Tires canister of 12a refridgerant. Word for word it says...not for use or sale in the USA but in next sentence says get this .....Made in USA.Consumer Commodity. Then I look at more of the cans fine print with magnifing glass and says.louisville TN...

Appreciate your posting the attachment. That system originally required less R-12 than I thought. Kudos to the OEM for specifying the exact weight-of-charge in 1960.

I'm not familiar with the Oil Analyzer Test Kits that you mentioned. But as for the yellowish-green fluorescent dye, only a small amount should be added to the A/C system for leak-checking purposes, typically around one to two tablespoon's worth (about 1 fluid ounce or less). What you already added ...

Adding to the comments just above, I don't blame Canadian citizens who want to work on their own A/C systems for using alternative refrigerants, since R-134a is very expensive and nearly impossible to get in Canada unless you're somehow certified and employed in the business. That's my understanding...

Also, for reasons of understanding, if the TVX superheat was much, much higher than 8°F, how would this be felt in system performance? I'm not a MVAC engineer, but to answer your question, I believe that with a much higher TXV superheat, the evaporator will be warmer because the liquid refrigerant ...

The test link brings me to a 2004 archive with Anonymous and Chick as the posters.

The important point to remember about superheat is that you don't want any liquid refrigerant to enter the compressor after it exits the evaporator because any liquid will "slug" the compressor and most likely, damage or destroy it. The refrigerant will be in a superheated state from the e...

How about the original TXV...is it still serviceable? A TXV doesn't "care" whether it's R-12 or R-134a that's used.

Place a thermometer in the center vent and keep it there so that you can monitor A/C performance as you drive. Should temperatures rise into the uncomfortable range, you'll know immediately that you have a problem, verified by the thermometer.

I had assumed that when the AC is evacuated, the oil would stay in the system and only the refrigerant is removed. The oil will stay in the system during evacuation prior to recharging. During recovery of the refrigerant using an RRR machine, some oil usually comes out. It accumulates in a graduate...