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Yes, in order for the compressor to take on the new coolant and oil charge the compressor ideally should be running. It is posiible to begin charging the system with freon prior to compressor initiation, however to get an accurate reading of the pressure in the system the compressor should be cycling with differential valve operating properly. If it is clogged or the compressor is not cycling then then low side reading will give an elevated pressure while charging the system. Does that make sense?
What else can I help you with?
What kind of freon is used for a 2002 ford focus?
R134a
Where is the valve to add freon on a 2000 Ford Focus?
It is either on or near the recievr dryer in the right rear of the engine compartment. To corrrectly add freon, you need gauges and a refrigerant recovery system
How much freon does a Ford Focus take?
You need gauges to repair AC.
What type of freon uses Ford Focus zx3 2002?
R 134a
Where is the freon port on a Ford Focus?
Underneath the right front fender spray skirt.
How much freon does a 2001 ford focus hold?
You need to use charging gauges.
Where is the freon port on a 2004 Ford Focus?
rf inner fender behind headlight
Is the Ford Focus a piece of junk?
I have a 2001 Focus with 209,000 miles and it is still running well.
Why is Ford Focus running lean?
Perhaps a clogged fuel filter.
How do you replace freon in your Ford Fusion?
a ford fusion does not have freon it has 134r take it to a mechanic
Freon capacity in 2006 Ford Taurus?
freon capacity in 06 Ford Taurus
Where is lower port hose for a 2003 ford focus freon add?
it is under the passenger side headlight facing towards the wheel
