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Old 08-09-2018, 05:33 PM   #1
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Post Recharging your A/C: is it necessary?

I've been reading online and I am very confused. Some say you should never recharge your A/C system if everything is operating properly. While others say adding pure 134a refrigerant/coolant will help with your cooling. My Mazda dealer says one shouldn't need to recharge the A/C either.

In particular, my 2005 Mazda3's A/C isn't quite as cool as it used to be, partly because the temperature outside these days is much warmer too. Additionally, in 2006 my A/C was checked at the dealer, discharged and new coolant with a dye was added under warranty for another issue. My understanding is that with the dye or lubricants, the A/C won't run as cool as one with pure coolant.

I'm in Canada and by law, only a licensed A/C technician can work on an A/C unit, that's why we don't have canisters and DIY A/C recharging system. In Asia, where temperature extremes are normal, people get their A/C unit serviced and flushed too at the dealer.

I am not a handy around my car and I wouldn't want to mess around with the A/C even though I can get my hands on DYI kits.

Can someone shed some clarity whether or not recharging the A/C is necessary?
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Old 08-09-2018, 06:10 PM   #2
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Re: Recharging your A/C: is it necessary?

You have to have the lubricants for the system to function. They don't hinder performance. Dye doesn't either.

In theory you should never have to recharge the system. It is a sealed system, so if everything is running properly it should be fine.
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Old 08-10-2018, 01:00 AM   #3
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Re: Recharging your A/C: is it necessary?

Leaks are the number one failure mode of a/c systems- the only way to know if your system needs refrigerant is to extract and weigh what is in your system. If it is not to spec, then you have a leak and it need to be fixed, You would not let a tire continue to leak would you? Does putting air in a tire fix it? I say not....
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