How do I put freon in my Toyota Corolla?

The air-conditioning in my car has been blowing warm air recently, and I think it needs more freon. I want to save some money and do it myself, so I picked up a canister of freon earlier today. How can I recharge the air-conditioning and put freon in my Toyota Corolla?

Answer
Performing some basic car maintenance, like recharging the air-conditioning in your Toyota Corolla, saves you a pricey visit to the mechanic, helps you better understand how your vehicle works, and most importantly, is easy.
The process to put freon in a Toyota Corolla is relatively simple, but you’ll add a refrigerant called R-134a because freon has been phased out due to environmental concerns. To recharge your car’s air conditioning, you should:
  1. Open the hood and locate the low-side pressurized service port on the aluminum pipe exiting the condenser.
  2. Fit the recharging kit’s coupler onto the service port but do not turn the valve.
  3. Start the engine, roll down all the windows, and run the air-conditioner at its lowest setting.
  4. Let the engine warm to its standard operating temperature and let the air-conditioning get as cold as possible.
  5. Turn the valve of the recharging canister and monitor the pressure gauge.
  6. Shut the valve off once you reach the recommended pressure indicated on the gauge, typically between 25 and 40 psi, and leave the canister attached for one minute.
  7. Continue monitoring the gauge and add refrigerant as needed, waiting one minute between spurts.
  8. Remove the coupler and allow the air-conditioner to run for about ten minutes.
And just like that, you saved yourself a costly trip to the mechanic!
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Jack Walsh
Answered on Jan 07, 2022
Jack is an insurance specialist and writer living in Buffalo, New York. He has a BA from Union College and worked as an insurance agent with Jerry before joining our content team. He enjoys using data and research to break down complex subjects and convey a story. In his spare time, Jack enjoys cycling, cooking, and exploring Buffalo’s beautiful waterfront.
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