Automotive Air Conditioning Information Forum (Archives)

Leggie on Wed July 11, 2012 9:42 PM

Model: Focus
Refrigerant Type: 134a
Country of Origin: Mexico

The car is designed in such a way that high side port is accessible right on top of the condenser, but the low side port is hidden behind the wheel well.

I know that refrigerant migrate from hot to cold. Is it ok to use heated cylinder or a recovery machine to push the entire charge into the system by the high side port so that wheel well won't have to be removed?

TRB on Thu July 12, 2012 12:18 AM

If you have the proper equipment you can "fill" a system through the high.

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GM Tech on Thu July 12, 2012 7:03 AM

That is the method used at the assembly plant-- that is why you'll always notice that high side ports are always easily accesible on any vehicle-- for factory fill.

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The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......