Remove the front drivers side tire, then try locating the low pressure valve (about 11 o clock when looking at the axle) under the engine on driver side. Theres a panel covering it, remove and you'll see it, normally they have blue, or black valves but this one is grey either way e-z cool or any other store bought should work. just watch the psi and stay under 40 to b safe. good luck im not a professional but this is how i did it.
the compressor is located in the lower front drivers side wheelwell. This is also where you recharge your A/C.
The recharge port for the air conditioning system on a 2002 Lincoln LS is located on the low-pressure side of the AC system. You can find it near the front of the engine compartment, typically on the larger diameter aluminum pipe connected to the compressor. It is usually covered by a plastic cap, which may be labeled with an "L" or a blue color. Always ensure the engine is off and the system is properly prepared before attempting to recharge the AC.
the low end pressure servvice port on a 3.9 litre 2001 Lincoln ls is on the ac compresser wich is located on the lower drivers side of the motor. easiest access is to take the drivers side tire off under the a arm.
You can recharge your 2004 Lincoln LS from the low pressure port. The low pressure port can be found on the top of the air conditioning compressor.
turn the car on
Service port is on compressor under car on drivers side, remove plastic scuff plate and you will see it.
Check relay
The 2002 Lincoln LS typically requires around 2.5 to 3.0 pounds of R-134a refrigerant for a complete AC system recharge. It's essential to check for any specific recommendations in the owner's manual or on the AC system's label. Ensure that the system is properly evacuated before adding refrigerant to avoid any issues.
$23
40 psi
AC filter change required
Down on AC compressor