How do you add freon to a Pontiac Grand Am?
It is best to have the system tested for leaks, but if you
really do want to add Freon, get a R134 can and hose kit from Kmart
or Walmart, or Partsource. You need to be very careful doing this.
Observe safety precautions. WEAR GOGGLES AND GLOVES and be VERY
sure you fill from the low pressure side. You need to fill it from
under the car, so if you can lift the front, or find a ramp or curb
to let the front hang over, it's a little easier. Get under the car
and find the compressor. The fill valve is close to the compressor.
Unscrew the cap and judge how the hose will fit on. It's a tight
fit. Now, get a 1/2 gallon pail of warm water (not hot). The freon
flows best if the can is warmed. Mount the hose to the can, and
start the engine and turn on the A/C to max. Verify the compressor
clutch has kicked in. If it does not, the system may be too low and
not engaging the low pressure sense switch. Probably best to get it
checked if that's the case. If it is engaging, connect the freon
hose to the low side fitting. Open the freon valve, and set the can
in the warm water. After about 5-10 minutes, the can should be
empty and floating. Close the freon valve and carefully (and
quickly) remove the hose from the inlet. Let the freon circulate
and check the A/C output. DO NOT OVERFILL the system. If it's still
not cooling very well, you might try another can, BUT NOT MORE THAN
the two. There may be other issues.