01 tahoe a/c problem
#1
01 tahoe a/c problem
I have a 01 tahoe and the a/c is giving me problems. The a/c blows good when a lil chilly out side but when its real hot it stops blowing. The ac light on the dash will turn off and when you push it to turn on it just blinks and shuts off?
#3
Welcome to the forum...
When its cool outside the air coming into the vehicle will feel cool...
Do you have the rear AC?
When you turn the AC on is the AC clutch engaging on the compressor?
Is it cycling or staying on?
I suspect the system is low and needs a charge but most likely has a leak... I suspect the leak is at the rear AC components...
But answering some of the questions above will help identify that
When its cool outside the air coming into the vehicle will feel cool...
Do you have the rear AC?
When you turn the AC on is the AC clutch engaging on the compressor?
Is it cycling or staying on?
I suspect the system is low and needs a charge but most likely has a leak... I suspect the leak is at the rear AC components...
But answering some of the questions above will help identify that
#4
yes i have rear a/c..the clutch does engage for a while then shuts off,but dosent cycle and ac light inside goes off. When you go to push the ac button to turn it back on it blinks 3 times then shuts off.
#5
This is for the 07 but it may have some items that apply...
#07-01-38-003: Information for Vehicles with HVAC Control Module A/C and Recirculation Indicators Flashing
Subject: Information for Vehicles with HVAC Control Module A/C And Recirculation Indicators Flashing
Models: 2008 Buick Enclave
2007-2008 Cadillac Escalade Models
2006-2007 Chevrolet Monte Carlo
2006-2008 Chevrolet Impala
2007-2008 Chevrolet Avalanche, Equinox, Silverado, Suburban, Tahoe
2007-2008 GMC Acadia, Sierra, Yukon Models
2007-2008 Pontiac Torrent
2008 HUMMER H2
2007-2008 Saturn OUTLOOK
2008 Saturn VUE
--------------------------------------------------------------------------------
Condition/Concern
Some customers may comment that the Air Conditioning (A/C) indicator on the Heating Ventilation and Air Conditioning (HVAC) Control Module flashes then turns off after they press the A/C button. Others may comment that the Recirculation indicator on the HVAC Control Module flashes then turns off after they press the Recirculation button.
This is normal operation for the HVAC Control Module and indicates that the A/C or Recirculation function is not available at this time.
Reasons that the A/C may not be available (calibrated values vary by program) are listed below. Consult the appropriate vehicle Service Information (SI) for detailed HVAC Description and Operation:
• Ambient Air Temperature is too low (if equipped with Ambient Air Temperature Sensor)
• Vehicle voltage less than 9.5 volts
• Refrigerant Pressure too low
• Refrigerant Pressure too high
• Engine Coolant Temperature too high
• Engine is not in RUN
• HVAC Control Head is in the OFF position
Reasons Recirculation may not be available: Mode switch in Floor, Defog or Defrost mode.
The reason(s) A/C is currently disabled can be viewed with a Tech 2® by navigating to HVAC Data display and viewing the "A/C Permission" parameter.
Recommendation/Instructions
Do not replace the HVAC Control Module for a flashing A/C Indicator or flashing Recirculation Indicator, as this is normal operation.
#07-01-38-003: Information for Vehicles with HVAC Control Module A/C and Recirculation Indicators Flashing
Subject: Information for Vehicles with HVAC Control Module A/C And Recirculation Indicators Flashing
Models: 2008 Buick Enclave
2007-2008 Cadillac Escalade Models
2006-2007 Chevrolet Monte Carlo
2006-2008 Chevrolet Impala
2007-2008 Chevrolet Avalanche, Equinox, Silverado, Suburban, Tahoe
2007-2008 GMC Acadia, Sierra, Yukon Models
2007-2008 Pontiac Torrent
2008 HUMMER H2
2007-2008 Saturn OUTLOOK
2008 Saturn VUE
--------------------------------------------------------------------------------
Condition/Concern
Some customers may comment that the Air Conditioning (A/C) indicator on the Heating Ventilation and Air Conditioning (HVAC) Control Module flashes then turns off after they press the A/C button. Others may comment that the Recirculation indicator on the HVAC Control Module flashes then turns off after they press the Recirculation button.
This is normal operation for the HVAC Control Module and indicates that the A/C or Recirculation function is not available at this time.
Reasons that the A/C may not be available (calibrated values vary by program) are listed below. Consult the appropriate vehicle Service Information (SI) for detailed HVAC Description and Operation:
• Ambient Air Temperature is too low (if equipped with Ambient Air Temperature Sensor)
• Vehicle voltage less than 9.5 volts
• Refrigerant Pressure too low
• Refrigerant Pressure too high
• Engine Coolant Temperature too high
• Engine is not in RUN
• HVAC Control Head is in the OFF position
Reasons Recirculation may not be available: Mode switch in Floor, Defog or Defrost mode.
The reason(s) A/C is currently disabled can be viewed with a Tech 2® by navigating to HVAC Data display and viewing the "A/C Permission" parameter.
Recommendation/Instructions
Do not replace the HVAC Control Module for a flashing A/C Indicator or flashing Recirculation Indicator, as this is normal operation.
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#8
OK, 10 years old, I d say the seals on the hoses have deteriorated and your r134a leaks out. If the refrigerant level is low the AC wont cycle on nor stay on when it does. You can recharge with one can of r134a and see if the AC compressor clutch snaps on. I myself dont use r134a anymore. I found a better refrigerant, r12a. Environmentally sound, a larger molecule and it only requires 1/2 of the volume needed for r134a, which means the AC system can operate at lower pressure and it less likely to leak past the seals. It is totally miscible with older systems so no need for an evacuation nor discharge of the system.
Well just an idea, I charged these cars up last year and so far the system is still under pressure and it was cold inside the last time we had a hot day last month.
Well just an idea, I charged these cars up last year and so far the system is still under pressure and it was cold inside the last time we had a hot day last month.
#9