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is this a question.
buy the can and read the instructions with it?
walmart even sells the kits. with a dial and hose, and can.
RTM read the instructions. or ask about steps , murky?
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.
Single Pressure Gauges for Indl., Commercial & Specialty Uses
3Turn on the airconditioning 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.
9Shut the recharging kit's valve and remove the kit from the low side port, once the system has been successfully recharged. Shut down the Civic's air conditioning, turn the engine off, and remove your key from the Civic's ignition. Also, shut all the doors
You need to take it to your local repair shop to have the A/C system charged. At that time they can inspect for any leaks in the system, and let you know if it simply needed recharged, or if any of the A/C components need replaced.
You can buy a recharge kit at your local parts store. The kit comes with a pressure gauge to let you know when the coolant level is good, over charged, or low. The kit cost about $25. With the kit hook up, it can't be hooked up wrong with the high and low pressure ends. You will be able to use this over and over, just buy new cans when you need to refill.
You will need R134a, and a filler hose. Charge the system on the low pressure side, it should have a blue cap on the charge point. Your filler hose will only fit the low pressure side, just in case the cap has been removed.