Last post on Nov 18, 2013 at 7:10 PM
You are in the Chevrolet Suburban & Tahoe
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Chevrolet Suburban, Chevrolet Tahoe, Chevrolet Tahoe Limited/Z71, SUV
#8 of 372 Re: Chevrolet Suburban & Tahoe: A/C - Climate Control Questions [tidester]
Jan 25, 2007 (10:18 am)
I have a 2001 Suburban with auto climate control. It started acting differently at the end of summer . . . everything still works the same as normal, except that when the cabin temperature gets to where it should be, the system doesn't back off enough. The computer still controls the fan speed, directs the air to different vents, and blows hot or cold air as required. Now in winter, it eventually gets too hot in the car, but it's still blowing hot air. I turn the temperature control down to minimum and adjust the fan speed manually to the lowest setting, but the air temperature is too hot and the car keeps getting warmer. Same in summer - it would keep blowing cold air, and with the temperature control set to 82 and the fan on minimum, it still got colder in the car.
The thing is it's different from how it used to work, where it would control to the temperature that was set.
The dealer simply said that I need a new computer. But to me it seems like a sensor problem, because the computer is still doing everything that it normally does, except backing off when it reaches temperature. It's as if it can no longer sense the cabin temperature correctly.
Has anyone had any problem like this, and if so did you figure out how to fix it? Any thoughts would be appreciated.
#9 of 372 Re: Problems with climate fan speed on 03 tahoe [technokoz]
Feb 06, 2007 (10:02 pm)
I have a 2001 Tahoe which also had fan problems. The fan only worked on settings 3 through 5. I replaced the blower resistor (about $30.00 from Chevrolet Parts). It is located on the heater shroud under the dash in front of the passenger seat. It was a simple fix that took only about 30 minutes. I needed a 5.5 MM and a 7 MM socket wrench.
#10 of 372 Too much hot air!
Feb 06, 2007 (10:07 pm)
I have a 2001 Tahoe and when I turn the temperature selector knob to full hot that's what I get, even when I turn the temperature selector knob back to full cold -- it still blows full hot. If I turn the motor off and let it sit for about a minute, then start it again, the air will blow cold at the cold setting. But if I nudge the temperature selector to a warmer setting, I get full hot again. Any ideas?
#11 of 372 Cabin temperature sensor
Feb 07, 2007 (6:51 am)
Does anyone know where the cabin temperature sensor is for the computerized climate control systems? There's a little perforated disk above the driver's seat in the hood liner, and sometimes I hear a noise from it - like something rotating and buzzing. I wonder if there is a sensor in there with a small fan to suck in air. If you know, please let me know - my problem seems to be that the computer doesn't realize when the temperature in the cabin has reached setpoint and a sensor problem would explain that. The dealer wants megabucks just to diagnose this, and I have no faith whatsoever that they will figure out what's actually wrong.
#12 of 372 Re: Cabin temperature sensor [ge_cco]
Feb 08, 2007 (3:47 am)
Others have said that the disk is exactly what you're guessing it is- a temperature sensor with a tiny fan that sucks in air to sample. I don't know how you'd diagnose the sensor(s) yourself though.
#13 of 372 Re: Too much hot air! [mickgz28]
Feb 09, 2007 (6:43 am)
I'll answer my own question since no one else did. By the way, if you want to visit a FANTASTIC Tahoe forum site where I found the solution to my Tahoe's problem, visit: http://www.automotiveforums.com. They have many more topics and ANSWERS!!! The problem was a flapper valve actuator. AC Delco part number 15-72506. Cost about $46.00 from a local parts house. I ordered online for $41.00 (shipping included) from http://www.oehq.com.
#14 of 372 I have same problem can you help with where this valve is
Feb 11, 2007 (1:43 pm)
Mick, need some help, I am handy with a wrench, but wary of tearing my dash apart. Is the flapper valve somewhat accessable? Any tips would be appreciated. thanks
#15 of 372 Re: Chevrolet Suburban & Tahoe: A/C - Climate Control Questions [ge_cco]
Feb 13, 2007 (5:13 am)
I'm glad that you solved your problem. Thanks for the website references too - they're really great.
It looks like I have also solved my problem. It turns out that the perforated disk in the head-liner above the driver's seat covers a device called an "aspirator", which is a small fan that sucks air out of the cabin over a thermister to measure the air temperature inside the vehicle. The thermister leads had bent and it was touching on the fan preventing it from spinning. Once I bent it back into place, the system worked normally. Not sure how it got bent in the first place!!
#16 of 372 2003 z71 Suburban DVD
Feb 13, 2007 (4:46 pm)
Does anyone know where I can buy the original Panasonic roof mount dvd for my 2003 Suburban. I have checked ebay.
#17 of 372 Re: Chevrolet Suburban & Tahoe: A/C - Climate Control Questions [ge_cco]
Feb 21, 2007 (2:28 pm)
I've got a problem with the same fan rattling when it is below 40 degrees. Once the vehicle warms up, the rattling goes away.
How did you "get" to this area in the head-liner? I haven't found any good way to investigate the rattling.
Could this termister/sensor be causing the rear compartment temperature actuator from working? The rear HVAR is stuck on cold, no matter if I change the temperature settings on the front upper console or rear console. I tried replacing the actuator, but that didn't fix it.