AC Chargeing question

[bansil]

there are two different fittings compare yours to whats availible
here is an example of the fittings
http://compare.ebay.com/like/120903272850

[chev49]

If you don't have a gauge set, just buy the freon and the cheap fill adaptor to the cans, and put one can in at a time, let it run a few min, and check the cold side going back to the compressor as it needs to be really cold to the touch, and the hot side needs to about burn your finger. depending on the humidity and ambient temp, the cold line should almost be sweating.. just my two cents...
i have the equipment... was a certified hvac person for several yrs. and for those who will complain, yes, there can be other problems in the system, and the pressures might not be exactly right, but this is the cheap way which usually works just fine.
Now... who is going to bring up the "use propane" in the system...

[bapos]

Theres a reason why no refrigerant is not in there. It has a leak. If systems are sealed properly they usually dont leak. yes you can put some in and make it work but im time if theres a leak it will make it ways out. I looks at the parts store and I see r134a is around 14.00 a lb so I would fix it so its a longer lasting purchase.

Chevy49 is right. Many factors go in to making sure the right setup is there. I am learning this in AC school right now. Granted its residential/ light commerical but they all work more or less the same.

Hope it works out.

[chev49]

all refrigeration systems with o rings and rubber hose will leak a small amount over time. mainly cause of the refrigerant molicule size. anyway that what i was taught in the hvac classes... but that was 30 yrs ago...

[bapos]

It hasnt changed in 30 years then.

[Jarlaxle]

I suggest finding a shop with a good A/C machine that will put dye in the system. (Though it's a bus, an A/C system is an A/C system...the only difference is the size!) Have them do it right: siphon out any refrigerant, pull vacuum for 20-30 minutes (which is also a leak test), then charge it with dye-impregnated oil and R-134a. Should run ~$150-200, will take 2-4 hours.

[lornaschinske]

In the past, we have used the DIY charge systems you can buy at the local chain auto parts stores. I believe they also have a leak detector kit as well.

[chev49]

ya can buy leak detector, and prob rent a vacuum pump as well.
i bought one used a long time ago.

[chev49]

not to mention a bad capacator... just got another one in with that....

[chev49]

also changing out the condenser to a larger one will do that.. works great.