Is freon the problem here?

occasionally, maybe once a week, the AC would crap out and not get cold at all for about 10 minites or so, then other times it acts normal. I'm trying to figure out if freon is the problem or if something else is causing it, thanks.

and how often do you have to add freon?

you shouldn't have to add Freon....ever

I work on home AC systems which are pretty close to car AC systems. The system comes pre-charged from the factory w/ the correct amount of Freon (r-22 i think) already in the system.

You could have problems in a couple of areas....

1. The Freon leaked out and you have hardly any left and then you'd have to replace parts

2. The Condensor pooped out on you and doesn't pump Freon right away.

3. The AC core is plugged.

you probably know alot more than me, but are you sure freon is not cosumed in any way? because i always see ads for "AC Service *refrigerant exta" or "Freon Included" , and hear about other people getting freon added to their AC because its not cold anymore..

also would any those problems that you mentioned cause the AC to fail only at random times? it doesnt seem like it happens very often but is definetely noticeable

are there any common factors for when the A/C fails? IE- outside temp, engine RPM, vehicle speed, engine load, time of day, area, ect...

also when it fails, what do the vents do? not blow, blow weak, blow hot, blow warm, blow towards the windsheild(defroster vents).

havent noticed besides its been during hot parts of the day (80-90's, socal) driving local, the vents blow just as strong just with zero coolness, I would say its warm air even, not quite as warm as turning the heater on

Its possibly a loss of refrigerant. Most r134 systems don't incorporate a sight glass because its not a reliable diagnostic, but if it does, check it while running the AC. If its hazy or bubbly (or anything other than clear) you are low on refrigerant.

All auto AC systems leak a miniscule amount at some point in their lives. The rate of the leak should determine if you need to replace parts or just recharge. I decided to recharge a leaking system and it performed fine for 3 more years since the leak was so slow.

The problem may also be electrical. A shorted wire or incorrectly calibrated sensor may be making the compressor not engage.