how cold should the rear AC be?

[T3rry]

I just changed my compressor as the clutch had failed, had the shop vacuum and recharge the system, and picked the truck up..


how cold is the rear AC supposed to be? i have the front AC on and i can feel it pretty cold, however, the rear doesn't seem to put out much "cold" at all, it seems to be the same temperature as if it were just set to "cold" without the AC on... does the front have to be set a certain way for the rear AC to work? i had the fronts on, with AC enabled, and the rear set to cold, and auto fan (which was basically full power).


I don't know if maybe i am just expecting too much.

 

[Anthony]

I have a 2004 LT and the front is just as cold as the back

 

[T3rry]

does it take time to get cold? i have only the manual fan (will be going e-fan soon) and was only driving for like 5 minutes, but the front had cooled down quite well, however the rear didn't.

 

[Anthony]

it takes about 10 seconds more then the front to get freezing cold in 90 degree weather (about 10-20 seconds for the front)

 

[T3rry]

OK, i'll talk to the guys that recharged me, thanks.

 

[YNOT]

(thread hijack)
can anything get damaged if it gets to low before recharging?

 

[T3rry]

no, it just wont work, if the pressure is too low the clutch just wont engage the compressor

 

[YNOT]

thanks, mine works but it isn't as cold as my blue truck was. i should recharge.

 

[yukonjacks]

One of two problems could exist. Low freon or a bad relay to your a/c compressor. Get a pocket thermometer and put it in your vents the temp should be right around 55 deg on an 80 - 85 deg day. Make sure its not the relay not allowing the cluch to engage. You can temporarily hot wire the a/c off the battery to engage the clutch. Run it for a minute or two to see if the temp drops. If your getting your a/c system recharged ask them to put a shot of dye in the system, you can use a black light to find the leak. Another way to find a leak is check all you fittings for any residual oil. It wont be a puddle, it will actually attract dirt and dust. If you find the leak, make sure you get a replacement freon R134a that has oil in the charging canister.

 

[T3rry]

it's not the compressor, the front AC works fine

it's not low freon, i was testing it as i drove away from the shop that refilled it


i have done some research and i think i have narrowed it down to a bad actuator in the rear vents which is making the temper adjutment for the rear not actually move the flap door thing.