AC only cold on half the vents

[drliu]

Flash041 -- did you check the low-end pressure before and after the recharge? if so, what was the pressure level?

 

[Drewstang]

Our A/C stopped working all together a few days ago. I didn't get a chance to take it after I made that post. I finally did run it up to the local A/C shop and I saw for my own eyes that the refrigerant level was extremely low. Our Ex had .12lbs in the system and factory specs are 2.12lbs. The shop also put some dye and oil into the system and we watched for leaks. There is a pin hole in the condensor so it will need to be replaced probably next season if we keep the truck. So, for all who have 1/2 A/C vent issues I would reccomend taking it to a shop and checking the level. My Auto Zone gauge showed the system full when in fact it was very very low.

 

[drliu]

I bought an Interdynamics refill kit (comes with gauge and a can of freon) at Walmart and found the pressure was low. Refilled the a/c and now it is blowing cold air from all vents.

 

[San'dy]

Had the same problem. What I saw here pointed towards the blend door problem, it was not. I had a leak, in the condenser. There was not enough refrigerant to cool all the air, only enough to cool part of the coil. Right side was cold, left side was room temp. The way the air flows across the coil one side will be cold while the other is not.

 

[dmask0]

cold air on pass side and warm air on driver side generally means you're low on refrigerant. before messing with dual zone stuff, try an $8 psi gauge from your local parts store on the low pressure side.
i've noticed too that when the system is low, you can connect the pressure gauge to the low side and watch the compressor kick on and pressurize the system from the 'underpressurized range' past the 'ideal green range' and it will go into the 'yellow' or 'red' overpressurized areas on the pressure gauge before kicking off and the system will drop back down to underpressurized. this repeates over and over. release some oil/refrigerant into the low side (while watching the gauge for overpressurization), and the pressure will (if you're minding the valve on the can of charge) dial right into the ideal 'green' zone and stay there. the compressor will stop clicking so loudly and it will stay steadystate in the green zone. you'll be GTG until your leak lets out enough oil and refrigerant to be underpressurized. for me, the stop leak cans generally get me from one warm season to the next on one recharge.

 

[jgaweda]

By the way, my steering control arm poked a hole through one of my ac lines. I never could have found it myself. Local shop found it within 10 minutes. Had the line replaced and refilled. Has been cold ever since. Cost me about $270 including parts and labor and about 2 hrs to complete.

 

[SidCharming]

Cold time of year... Heat blows on Driver/ Cold on Passenger

I have Dule climate control and when set to 72, the drivers side is a comfortable warm temp... however the front passenger is freezing b/c the vents are blowing cold air.

Anyone experience this? I see many postings are during hot season, not winter/cold.

I don't have equipment to check compressor in A/C unit, but don't see logic that this is possible problem.

Also the door blender... any directions on how one would check or where to check for it?

Thanks

 

[thezuck]

For me it was the opposite....passenger side warm and drivers side cool with A/C on. The problem was low refrigerant level.....recharged system and works fine now.

 

[SidCharming]

I've checked the refrigerant level and everything is as expected. Even went as far as to check engine coolant... also good as expected.

Wondering if I have a sensor not working (somewhere in passenger side of vehicle).