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2016 EXL AWD Nav with sensing , 2008 Corolla SE
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Are you sure it is low on Freon? If it is, you will need a R1234yf fill kit and a can of R1234yf Freon . You just add freon to the low side of the system through the port on the larger pipe until you get to the desired pressure. Chances are that you have a small leak somewhere but it is possible that you were low on freon from the start. If you are not sure of what you are doing, you should go to an A/C service shop and have them test it for freon pressure on the high and low sides and go from there.
 

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2005 Honda Pilot, 191,000 miles
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Honestly your best bet is to take it to a shop and have them fill it. They will vacuum test your system, add compressor oil and charge with the correct amount. The canned ac you get at the auto store will work, but most of the time you will overcharge your system and end up damaging something. Also keep in mind that if you add any canned freon that has any stop leak in it, any shop you take it to get it charged correctly will not touch it. When they go to evacuate your AC, the stop leak will go into the machine and plug it and render it useless. Those ac machines are close to 10k dollars and I would not be surprised if you didn’t tell them you used a stop leak Freon can and it broke their machine, they wouldn’t be happy. And you still wouldn’t have AC. It’s worth the $150 to get it done professionally!
 

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Very much agreed with Islet. All 1234yf machines have a refrigerate identifier in them, the parts store stuff rarely passes. If you add something that doesn't pass, good luck getting any professional shop to ever work on it again. We have turned away quite a few veh because of it.
 

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2016 EXL AWD Nav with sensing , 2008 Corolla SE
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Very much agreed with Islet. All 1234yf machines have a refrigerate identifier in them, the parts store stuff rarely passes. If you add something that doesn't pass, good luck getting any professional shop to ever work on it again. We have turned away quite a few veh because of it.
Yes, you definately don't want to top it off with anything other than R1234YF refrigerant and do not use any of that leak stop stuff or other generic refrigerant as it will contaminate the whole system.
 
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