Climate Zones. ac recharge- e53

[bastereo]

Because it leaks out. Period, no other reason to add, it doesn't get used up or worn out or old.

A leak is the only reason you would need to add refrigerant. So if your ignoring the leak in your ac system, you can be cheap and grab a can and periodically recharge the system instead of fixing the leak.

That leak in your ac system is also leaking out the refrigerant oil for the compressor too...

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[Zulu95]

If it you keep recharging when your system is leaking you will eventually lose all the oil in the system unless the recharge cans also add oil. Some very expensive items will eventually fail. Suddenly the $95 -$120 an AC shop would charge will look like a very good deal.

[TiAgX5]

Originally Posted by alex77ae

Are you out of your mind?! ^
Than why do cars need a recharge. If it didn't leak out? Can you explain why they sell refrigerant kits at every store. So why does the ac
Stop cooling?

R134a Refrigerant doesn't get consumed nor does it "go bad". The kits are sold so those who replace AC system parts and those who have low refrigerant levels can fill/charge it to the proper level. NO AC system has ZERO leakage, there is ALWAYS small amounts that will leak past the compressor seals over years of useage.

[Ricky Bobby]

Well said guys.

I always was taught that if you have to add refrigerant on a closed AC system, you have a leak (assuming no parts were replaced)

[TiAgX5]

Even the swelling of flexible AC hoses due to heat cycle and pressure over years of useage will increase the internal volume of the hoses and therefore DECREASE pressure.

[ake53]

heres the scenario...
My system was tested for leaks at a shop....
NO LEAKS FOUND...
never been recharged in the life span...

Possibly theres a tiny leak on cars once they get older?

But than again... you get a recovery machine and pump out all the old r134a and than add new r134a to the right pressure.

[TiAgX5]

Originally Posted by alex77ae

heres the scenario...
My system was tested for leaks at a shop....
NO LEAKS FOUND...
never been recharged in the life span...

Possibly theres a tiny leak on cars once they get older?

But than again... you get a recovery machine and pump out all the old r134a and than add new r134a to the right pressure.

No need to evac and refill, you have not replaced ony parts in the system. Get a low pressure side gauge and hose along with a small can of R134a, fill up to the point where you see 45psi on a 90 deg F day with AC running on high and all vents open, including rears. If you were to evac and refill you would need to add 2 oz of PAG oil for proper compressor lubrication along with the 14 oz R134a charge.

[PUREVIL]

Originally Posted by alex77ae

But than again... you get a recovery machine and pump out all the old r134a and than add new r134a to the right pressure.

The key there is that it is a "recovery" machine. It literally takes the freon out of your system, separates the oil from the freon, and then holds YOUR "old" freon in a tank. When they are done replacing parts, seals / vacuum testing - they will actually put your "old" freon right back in. If the system was low when it came in they will add enough freon to get it back up to spec. If the system was empty, of course you will get all "new" freon.

If ever I have my A/C worked on, I always put PAG oil with dye in. It makes future leaks easy to detect and IMO saves time and money down the road.

[TiAgX5]

Whenever I have a system with over 50k miles evacuated and refilled I always have new R134a and PAG oil installed, this is because the system could possibly have some foreign materials from compressor wear. Cheap insurance.