Hola. I have dual climate control on my '05 ES330. In the past week wife has noticed that the driver's side a/c vents are not blowing as cold as the passenger side vents. It's still blowing cool, but there is a noticeable difference putting your hand in front of the vents, and definitely seems to not be as cold as before on driver's side. Switching to DUAL also changes the output, so it appears that function is operating properly.

I've poked around the net some and several posters say to make sure that a/c sys is charged. I only have a gauge to read low side, and it says it's okay. I also followed another's suggestion to disconnect the battery for an hour an reconnect. Lastly, i found one guy that said you can cycle the climate control but turning on ignition (not start), hold auto and recirc buttons. None of these seemed to do anything. I am also skeptical (and hopeful ) of it NOT being a blend door prob as it's still blowing cold, not warm.

I will add that I never had reason to put my hand in front of one side then the other prior to wife alerting me to this, so this could just be a quirk in the design. (One post I read said that if the a/c charge is low, you will get cooler output from the passenger side b/c that is where the evap + stuff is located).

My questions are:
1) has anyone else experienced this symptom?
2) does dual-climate use separate plumbing for each side?

Any troubleshooting advice is welcomed. Hate to go to the stealership. Thanks in advance for the help all.

 

It might be a stuck gate in the ducting. I think the temperatures are controlled by motorized door flaps in the duct-work to regulate the temperature.

What happens when you put one side to hot and the other side to cold?

 

I am able to still get heat on one side and cold on the other, so the dual setting seems ok.

 

Find both the battery and ign fuses for the hvac pull them out, count to 30 then replace them. Now start the car and do nothing for about 5 minutes. Sometimes the blend door actuators get out of time and the hvac control unit needs to be rebooted in order to calibrate.

 

My wife was reporting condensation vapor coming out of the pass vents (the colder side). I recalled this happening in another vehicle I owned and believe that was an indicator that it was low on freon. The low side a/c gauge (only one I have) showed it was a tad low when the compressor was running. I added a can yesterday and in my short test drive, it appears that this may have evened out the temp issue, based on my short test drives yesterday. Fingers and toes crossed... do NOT want to tear the dash apart :-\

 

plz need. Update.

 

Hello,

Please start a new thread elaborating on the issue you have, people on this thread haven't been around for about 8 years by now. Without knowing the specifics of your particular issue, it will be really difficult to come up with a constructive answer.

Hope this helps and best of luck!