Determine if in case you have any refrigerant left in your system at all.
To do this, you'll need to suit a charging hose on the low pressure port, mentioned later. Make sure you use eye protection. If your system is completely discharged, it could be contaminated with moisture, and charging won't give passable outcomes except the source of the leak is found, repaired and the receiver dryer replaced. The open system should be repaired and purged using a vacuum pump to take away air and moisture. Additionally, you will need to add compressor oil if the system has been leaking. Evidence of oil leakage and measurement of oil left in a changed compressor will probably be a information as to how much oil to replace.
Check for any apparent leaks. In case your system has lost enough refrigerant to quit working, you've got a leak.
Small leaks might take months to deplete the refrigerant in order that the AC fails to chill, however charging a system with a big leak is simply a waste of time. Search for refrigerant oil residue on hose, tubing, and fittings which might be a part of the refrigerant system. Spray a soapy water solution on fittings and watch for bubbles to appear, indicating a leak.
Be sure that the condensing coils are usually not obstructed with debris, and that the compressor is operating.
To check a compressor with a low cost chances are you'll need to leap the pressure swap, typically positioned on the accumulator.
Faucet your refrigerant can.
That is carried out by opening the valve on the tapping fitting utterly open, which retracts the tapping pin into the valve body. Failing to do so will outcome in the tap puncturing the can when it is installed, releasing the refrigerant before the fitting is sealed.
Securely thread the tapping valve on the refrigerant can, close the valve utterly shut.
This drives the pin into the highest of the can, making it doable to release the refrigerant when the valve is opened.
Purge the charging hose by opening the valve till you hear it fill with refrigerant, then slowly loosening the brass fitting that connects the hose to the valve.
Be careful to not allow refrigerant to spray on bare pores and skin, as this will freeze skin tissue on contact. Re-tighten the hose upon getting heard refrigerant escaping, this should have pressured any air (and moisture) from the hose.
Locate the low strain charging port on the refrigerant line in your car. This shall be on the larger tube, often near or on the accumulator. Join the quick coupling and make sure it isn't leaking.
Crank your engine and switch the AC on excessive cool, excessive fan.
In case your recharging hose is equipped with a strain gauge, examine it to determine if the system needs refrigerant. If the stress holds regular in the recommended range, the system is full and should not be charged. If the stress is beneath the really helpful range, comply with the instructions to recharge the system. Another indicator that the system needs refrigerant is that the compressor cycles rapidly. If the compressor switches on and off every 5 to twenty seconds, it's most likely because of low pressure. You will note the strain drop when the compressor kicks on, the compressor will shut off when the pressure gets too low, and the pressure rises again as much as the working vary because the system equalizes. Compressor biking (switching on and off) in a very charged system must be very sluggish (each 30 seconds or up) or in no way current (compressor stays on) in hot weather.
Open the valve until you hear refrigerant passing through the hose.
Enable the can to dispense its contents.
This usually takes anywhere from two to 5 minutes. The warmer the surface temperature, the extra shortly the contents will discharge. Hold the can with the faucet up always, to allow non-liquid refrigerant into the suction side of the system to prevent compressor damage. Do Not overcharge! A manifold gauge needs to be used to measure each excessive and low side pressure. Consult a Strain temperature chart.
Shut the valve and disconnect the hose when the can is empty or no longer discharging enough to maintain the can cold. Verify the charging port for leaks, and change the plastic cap.
Verify the air from the AC vents in the car.
It must be blowing cold (38-45 degrees), if not, either one can of refrigerant was not sufficient to charge the system, or some other component is the problem. Do Not overcharge! A manifold gauge must be used to measure both excessive and low side pressure. Consult a Stress temperature chart.