I own a 2001 coupe that has the dual-zone climate control. I've owned it for about 9 months now but the dual-zone thing still has me a bit confused.

My question is this- when you make a temperature adjustment on the passenger side, does that change read-out on the digital display? In other words, If you twist the **** on the passenger side, is that change reflected in the digital display like it is when you make an adjustment on the driver's side? Mine doesn't but I can't determine if that's normal or not. I also have a difficult time feeling any real difference in the temperature of the air coming out on the pax side of the car.

I understand that if you have the temp turned down all the way on the driver's side control, that locks out any sort of control that the passenger side has. I've also read my owner's manual but I can't seem to get an answer from that source.

If this has been covered in another thread, I apologize in advance. I did do a search but most everything seems to revolve around the displays dimming. Thankfully, mine isn't doing that. At least not yet.

Thanks, Clint

 

No the Pass control will not show up on the display and I BELIEVE it only changes the Pass side temp by about 3 dregrees either way... Not very much, you could use a thermometer to verify it is changing though.

 

When you adjust the temp on the pass side, it does not change the display number on the HVAC.

 

Thank you both very much. I appreciate the information.

Best, Clint

 

Also, if you leave the pass. side straight up, it will be the same on both sides.

 

The dual-zone HVAC is in my opinion a worthless option. Actually, worse than worthless. I bought a low-mile '03 Coupe a couple years back and it had the dual-zone. I didn't know squat about the system then, but if I had known what I have since learned I would have tried to find a car without it. Dual-zone is far more trouble-prone, gives you no benefits that I can feel or see. Mine, 'tho it seems to work all right, throws codes for no apparent reason. They clear, but I always wonder if more persistent problems are waiting for me down the road. The thought of me--or worse, some shop tech--having to tear into the dash frightens me stupid.

 

i have it in my 04 ce (OEM equipment as part of the CE package) and i haven't had a problem with it. i believe that the actual change in temperature is more than 3 degrees. all i know is that whenever my wife changes it because she is cold in the car, it seems to be enough to make her happy (that when it is all said and done is all that counts!!) i can't comment on using it to make that side colder as that has never been the issue.

 

i saw this in another thread. I believe bill said its a 10% difference which isnt much no. However i do know my GF can feel the difference. She gets cold faster than i do so it works great for me! Usually if its set 68-73 (example) degrees and you turn your passenger side all the way over to max heat there will be a definite difference.

 

i cant tell any difference in mine either,,,,,,,,but i don't sit in the passenger seat???

 

Thanks for that. I did manage to figure out that little tidbit in my time reading the manual.

I guess I'm used to how these dual-zone HVAC controls work in other cars. Specifically, my wife's Honda. It displays two different temps and you can definitely feel a difference. I agree with some of the other posts though. I can't feel much of a difference in my C5 at all. Oh well, I'm solo 90% of the time I'm in the car anyway.

 

Has anyone every changed the dual zone to a standard one? Just wondering.

 

Interesting question. I haven't seen anyone post about this but you may want to do a Search.

 

I actually posted a question about this several weeks back and you will have to change out your entire blower unit along with the main display and get a new wiring harness and wire in the thermostats for the ac. So yes its possible but not really feasible.
Also if Im not mistaken the passenger thermostat control varies the temperature my 10% in either direction as long as it not maxed out in either direction for the driver.
And I got that info from Bill Curlee

 

Hi Clint,
I'll glad and surprise to read the answers you received. I bought my 2000 Vette 3 years ago and always thought the passanger side of my climate wasn't working because he number wasn't changing...
More than that, last summer, I thought my climate wasn't working well because the temperature was not equal, the passanger side was less cold than the driver side. I was just to buy a new climate box...
Now I understand. Thanks everybody.

Mich

 

Mich,

I was on the cusp of doing the same thing (buying a new climate control head). This forum really is great. I don't post here very often but I look at it daily. Thanks again everyone.

Clint

 

From Owner's Manual:

Digital Display

The digital display shows readings in Fahrenheit or Celsius by pressing the E/M button (English/Metric) on the Driver Information Center (DIC). When you start the vehicle, the display will show the current fan speed, air delivery mode and the driver-set temperature for approximately five seconds and then show the outside temperature.

When the system is fully in the automatic mode, the word AUTO will also appear on the display unless you are in full cold 60°F (16°C) or full hot 90°F (32°C), then the word AUTO will not display. If you have selected a manual fan speed, then the fan symbol will appear on the display. If a manual air delivery mode has been selected, the delivery mode symbol will appear on the display.

Driver Set Temperature ****

The DRIVER **** changes the temperature on the driver’s and passenger’s side of the vehicle. Turn the **** clockwise to increase the temperature and counterclockwise to decrease the temperature. Whenever you turn this ****, the temperature will be displayed for approximately five seconds along with the current fan speed and air delivery mode.

When adjusting the temperature, start with a driver-set temperature of 73°F (23°C) until you determine your comfort zone. If you choose 60°F (16°C), the system will remain at maximum cooling and will not automatically adjust fan speed or air delivery. If you choose 90°F (32°C), the system will remain at maximum heating and will not automatically adjust fan speed or air delivery. Choosing either maximum setting will not cause the system to heat or cool any faster. Turning the **** past either maximum setting has no effect on the operation of the system.

Passenger Temperature Offset

The PASSENGER **** changes the temperature on the passenger’s side of the vehicle. When the **** is in the 12 o’clock position, the passenger’s temperature is the same as the driver’s. Turn the **** clockwise for warmer air on the passenger’s side, counterclockwise for cooler air. If the driver-set temperature is set at 60°F (16°C) or
90°F (32°C), turning the passenger **** has no effect because the system is locked at a maximum setting.

Automatic Operation

Press the AUTO button to place the entire system in the automatic mode. After a five-second display of the current settings, only the word AUTO and the outside temperature will be shown on the digital display unless you are in full cold 60°F (16°C) or full hot 90°F (32°C), then the word AUTO will not display. The system will operate to achieve your comfort set temperature as quickly as possible. The AUTO control system works best with the windows up and the removable roof installed or the convertible top up.

A Typical Cold Weather Example:

Your vehicle has been parked outside overnight in cold weather below 32°F (0°C) and you have set the driver temperature at 73°F (23°C) and have selected the AUTO mode. The system will automatically adjust the temperature output to maximum heating. The fan will start at a low speed. This is to avoid blowing cold air into the vehicle. The length of the delay depends on the amount of time since the engine was last started, the outside temperature and the engine coolant temperature. As the coolant warms up, the fan speed will gradually increase. Air will flow to the floor with some air to the windshield to prevent fogging under most normal conditions.

As the interior of the vehicle warms up to your comfort set temperature, the fan speed will decrease and the temperature output may become cooler. If the interior temperature continues to warm up due to heating from the sun or outside temperature increases, the system may switch to other air delivery modes (typically DEFOG or BI-LEVEL).

A Typical Hot Weather Example:

The vehicle has been parked outside all day in hot weather above 80°F (27°C) and you have set the driver temperature at 73°F (23°C) and have selected the AUTO mode. The system will automatically adjust the temperature output to maximum cooling. The fan will start at a low speed momentarily to push the hot air to the floor of the vehicle and then go to a higher fan speed with cold airflow out of the instrument panel outlets. A small amount of airflow will continue through the lower ducts to cool the floor area.

The air intake may start in the recirculated mode for maximum cooling performance. As the interior of the vehicle cools down to your comfort set temperature, the fan speed will decrease and the temperature output may become warmer. The air intake may shift from recirculation to outside air mode. If the interior continues to cool due to a decrease in the amount of heat the vehicle is absorbing from the sun or a decrease in the outside temperature, the system could switch to other air delivery modes (typically BI-LEVEL or DEFOG).


[I thought it said something about the temperature differential too, but it didn't. I know I saw it somewhere. Maybe in the FSM.]