RED TEKProAir A/C Performance Enhancer (4 oz. can)

Extended the life of a 1990 Adler Barbour marine unit. Local experts laughed at recharging and replacement. Up theirs! They weren't as expert as they thought they were.

I use this in my what use to be R12 truck I have tried all the other freons and this was my replacement

I'm updating this review.After about 2 days, the fridge would not cool properly. I measured the pressure in the compressor low side. With the compressor running, it was too high. With the compressor not running, it was VERY high. I basically had to drain most of the gas out of my compressor and refill with refrigerant to get things running properly. I'm sorry I used this product at all.------old review-------- I have an old sub zero. Recently charged it with R12a. It was cooling fine. When I saw this, decided to try it.There's nothing in the page on Amazon telling you how to use it.The can says it's equivalent to 2 OZ of coolant. It also says to put it in before adding coolant. But mine already had coolant. So I measured the pressure on the low side, then drained some in a plastic bag to take outside, and added this. I got the same pressure after adding this.So I was a little worried because for about an hour, the fridge got warmer. So I let out some more pressure, turned off the thermostat and waited a minute. Then turned it on.Now, after a few hours, fridge is cooling perfectly. The difference seems to be how hot the compressor is getting. It's running cooler. It's still warm, which it should be, but it's measuring 10 to 15 degrees cooler on my laser temp gauge.So far so good.

Felt noticibly colder when freon was at full charge!! Recommend

I hav an 84 Mercedes Benz 380se.. added 134a (wrong freon) bled that all the way out. Added 3cans of this blow-n icy cold. Blow-n hot B4.

Worked great on my 89 Porsche with original R12 system. 134a always blew hot air

Does not work on R12 system! Didn’t do anything to cool the car,,

Thanks for making this available. Installed and functions just like factory.Would buy from this vender again.