Question about 1996 Pontiac Trans Sport

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Recharging air conditioner

I can't identify the low service charge port of a 96 Pontiac Trans Sport. The one I think it is doesn't accept the recharge hose connector.

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START AT THE FIREWALL WHERE THE LINES CONNECT, MOVE ALONG THE LINES ABOUT 10 - 12 INCHES OR SO. THE LOW SIDE CONNECTOR SHOULD BE THERE UNDER THE WIPER TRANSMISSION BEHIND THE COIL PACKS. THE HIGH SIDE IS NEAR THE COOLANT RECOVERY TANK. YOU MAY HAVE TO LIFT IT FROM THE RETAINER.

Posted on Jun 02, 2009

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2006 Silverado went from blowing cold to hot. I think it might be the compressor but I don't want to spend 300 bucks if I don't have to any ideas???????


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    • 1Start the recharging process with any left over freon you may still have. Open the Civic's hood and attach the kit to the Civic's low side port. Then, set the kit onto a place in the engine compartment where nothing can move or shift once the engine has been cranked.
    • 2Start the Civic and let the engine run until it reaches its normal operational temperature.

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    • 3Turn on the air conditioning to its coldest and hardest-blowing settings. Place a thermometer into one of the Civic's air conditioning vents and monitor how the temperature drops. Once the air conditioning's temperature reaches a level, constant degree, remove the thermometer.
    • 4Open all four doors on the Civic. This will allow any colder air generated to escape, and this will keep the Civic's air conditioning for accidentally cycling off while you recharge the refrigerant levels.
    • 5Turn the recharging kit's valve all the way down and let the refrigerant charge into the Civic's air conditioning periodically, shut the valve and look at the kit's gauge. This will allow you to monitor the recharging process. Allow at least one minute to elapse between refrigerant charges into the system.
    • 6Shut the valve of the canister, once it has become depleted. Disconnect the kit from the low side port.
    • 7Detach the hose, gauge, and valve from the empty canister and attach them to a new canister of refrigerant. Reattach the kit's hose to the Civic's low side port and continue recharging the system, allowing a minute between individual charges. The can itself can potentially grow very cold and hard to hold, even with gloves. Should this happen, wrap the can in a towel warmed in water. Ring out excess water before wrapping the canister.
    • 8Place you thermometer into one of the Civic's air conditioning ducts. Keep an eye on the falling temperature within the Civic's air conditioning system. The system is charged when the temperature hits 40 degrees. Also, within the engine compartment, the Civic's air conditioning aluminum tubing become uniformly cold.
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If you are recharging the air conditioner - start at the A/C pump, and follow the lines up until you find a black round stub (this unscrews) and this is where you will re-fill (recharge) the A/C.

NOTE: It is recommended to have a professional (certified) mechanic recharge A/C systems, but is not necessary. (laws and regulations vary per state, city, county).

Please let me know if you need further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

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Check the pressure in the low side A/C line. My guess is the refrigerant is low and needs recharging.

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