Do It Yourself Auto Air Conditioner Repair Instructions Recharge

the first thing to do is to check what kind of refrigerant you need. you can find this information on the hood of your car. as you can see from the picture here, my says i need r-134a

AIR CONDITIONER - nissan
	Refrigerant	Compressor Lubricant
TYPE (Part No.)	HFC134a (R134a)	Nissan A/C System Oil Type S [KLHOO-PAGSO]
Amount	0.65 _+ 0.05kg (1.43 _+ 0.11l bs)	200ml (6.8 fl.oz)
CAUTION PRECAUTION
refrigerant under high pressure. system to be serviced by qualified personnel. improper service methods may cause personal injury. consult service manual this air conditioner system complies with SAE J-639.
Nissan Motor Co. Ltd. Tokio, Japan 27090 0w000

this is what the bottle says it does:

fast and easy accurately restores a/c cooling:
* replaces lost refrigerant & oil
* safely seals most leaks on hoses, gaskets and or-rings
* color-coded in-line gauge provides for accurate fill.

contents: 15 oz refrigirant 134a (1,1,1,2 tetrafluoroethane), 3 oz system-safe leak sealer, lubrincant qwikboost a/c performance booster, and a/c system cleaner.

ok, the first step is to find low pressure port.

the low-pressure port of the a/c system usually has a blue or black dust cap and is located on the larger diameter tubing that runs between the evaporator (in the dashboard) and the compressor (on the engine). unscrew the dust cap.

note: on my car. the low pressure cap had the letter l in it to indicate low

start engine and set a/c to max cool. meaning go inside your car and turn on the air conditioner and put it to the maximum cool allowed so its at the coldest

now connect the charge coupler to low-side port (pull back coupler sleeve and push coupler onto port, release sleeve to lock-on). Check gauge reading, refer to char below for diagnosis:

PRESSURE GAUGE CHART: Pressure reading sshown in the chart are typical for ambient temeratures of 75 to 85 fahrenheit. the pressure will be higher at higher temperatures and lower in lower temperatures.
LOW	0-25 psi	add refrigerant
FILLED	25-45 psi	system has proper amount of refrigerant
ALERT	45-65 psi	do not add refrigerant! Seek professional help
WARNING	65-200 psi	Do not add refrigerant! Your systemhas a problem other than low refrigerant. Seek professional help.

In my case, the gauge show it was low, so i go to the next step

once you have your engine on and you have connected the charger and the ac is on max cool, shake the can well, press the dispensing button completely, rotate top of can between 12 o clock and 3 o clock every 2-3 seconds while continually shaking can back and forth. continue process until can is empty in about 10-15 minutes or until correct amount of refrigerant is charged into ac system. you will know, when pressure reading should in the blue psi range. see the pressure gauge above

now you can enjoy the summer inside you nice cool car. dont have to worry about the heat. awww sooo cool

you can probably do it for all these cars Avanti, Bentley, BMW, Buick, Cadillac, Chevrolet, Chrysler, Daewoo, Daihatsu, Datsun, DeLorean, Dodge, Eagle, Ferrari, Fiat, Ford, Geo, GMC, Honda, Hummer, Hyundai, Infiniti, Isuzu, Jaguar, Jeep, Kia, Lamborghini, Lancia, Land Rover, Lexus, Lincoln, Lotus, Maserati, Maybach, Mazda, Mercedes-Benz, Mercury, Merkur, Mini, Mitsubishi, Nissan, Oldsmobile, Peugeot, Plymouth, Pontiac, Porsche, Renault, Rolls-Royce, Saab, Saturn, Scion, Sterling, Subaru, Suzuki, Toyota, Triumph, Volkswagen, Volvo, Yugo

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my 1995 cadillac sedan deville ran low in refrigerant and compressor cut off and will not come back on with out resetting the safety switch. i cant find the switch. can you help with the location? jimmy