Adding Freon to your automobile's Air Condtioning system

Step 5 Final thoughts

As you can see in the photos we dropped 30 degrees and it actually went down to 51 degrees. Good enough.
A recap:
SAFETY GLASSES AND IF YOU WANT GLOVES...
Charge the system with the can upright position. By the way it can take up to 1/2 hour to charge a system...
If your system is very low when you start putting in freon the compressor may not start turning until a sensor sees you have a predefined minimum amount of freon. Add 15 minutes more for charging. This is a safety so you don't damage the freon compressor...
If you see oily goo all over your compressor or at a line fitting don't bother charging it as it needs pro service or your shooting your wallet in the foot in the long run...
If after you charge your system the cold air comes and goes and comes and goes you have moisture in the system and it needs to go to a pro...
If things don't seem to be working as I have described in this topic then something else is wrong and you need to have a trained pro look at it...
Remember a pro uses gauges to check pressures on the high and low pressure sides. He factors in ambient air temp and even humidity levels and he can pinpoint complex problems like that. We used the >watch the symptoms< process to determine we are in the ball park in terms of the amount of freon we have in our system. My feeling is a little low is way better than too much...
After your all done check the port cap to see its in place. Put your tools away. Go for a nice cool ride. If it all works ok go look in the mirror and say. I DID IT AND PAT YOUR SELF ON THE BACK FOR A JOB WELL DONE!