too much pressure in A/C?

[NewbieVet]

So I went and had my oil changed at Juffy Lube today. Part of their service is they hook the truck of up some machine, and the machine indicated I have too much freon and that as such the a/c is struggling to convert the liquid to gas. The guy says I'm probably losing 2-3 degrees because of it. when I asked what I could do, he said by law the only thing was to empty and refill the entire system, but then he pointed to a little valve and told me that i could release some gas from there by using a pen or something to depress it. My question is, how much do I want to release in order to get this thing working right? 5 seconds? 10? 20? Any thoughts appreciated.

J

 

[tsingson]

grab a gauge to see how much pressure you have and then try and see...that would be my suggestion...

 

[Racenut]

If they checked the pressure while the truck was off, or if it was just started the pressures will show high and this is normal. As the interior cools down the pressure will go down.

This is the reason that it is advisable to leave your windows cracked during the summer months. When your vehicle is parked and the temp inside climbs so does the pressure in the A/C system ( this can cause O-ring failures or other system leaks ) once the vehicle is running and the temp inside begins to cool ( also this is why they recomend opening all the windows when you first turn on the A/C to let the temp inside equal to the outside ) then the system pressures will return into " Normal " operating range.

Go to your local auto parts store and get a gauge, hook it up and record the pressure. Start the truck and turn on the A/C - record the pressure. Let the truck run with the A/C on full blast for about 5-10 min and record the pressure.

This will show you how the pressure will drop as the interior temp drops. If the pressure is still high after 15 min then the system may be over charged ( The gauge will show you the different levels )

Green = system low
Blue = good pressure
Yellow = Alert
Red = High pressure

When you first hook up the gauge it will show in either the yellow or the red and this is normal. After 15 min you should be between the blue and the first 1/4 of the yellow. If you are showing in this area after 15 min then do not worry.

 

[GAINMOB]

for now on i will open all windows before starting my A/C...learned something new...

 

[panda24619]

2 things. dont run a/c. not hot enough and still have YET to fix my drivers window. and now my pass is going out. just gonna lube it before it breaks too.

 

[JUST4FUN]

A/C needs to be done by weight ,the system is in ounces , i think with rear air its 56 oz
thats the proper way to do it is with a recycler