Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 735 (HEATING, VENTILATION AND AIR CONDITIONING)
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 735 (Heating, Ventilation And Air Conditioning)
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 735 (Heating, Ventilation And Air Conditioning)
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- HVAC (Heating, Ventilation, and Air Conditioning)
- Climate Control
- Component Location index
- A/C Service Tips and Precautions
- A/C System Inspection
- General Troubleshooting Information
- How to Check for DTCs with the HDS
- How to Use the Self-diagnostic Function with the HDS
- How to Use the Self-diagnostic Function without the HDS
- Trouble code memory function
- Checking for DTCs
- Displaying Sensor Inputs at the Climate Control Unit
- Check these items before using the sensor input display mode
- To run the sensor input display mode, follow these steps
- Mode Motor Code Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- Notes
- Oil Separator
- Climate Control Door Positions
- Air Conditioning System Control in the ECON ON Mode
- Auto Idle Stop System Control (A/C: Air Conditioning)
- Auto Idle Stop Disable Conditions ('10 model)
- Auto Idle Stop Disable Conditions ('11 model)
- Dual Construction A/C Pipe
- A/C Pressure Sensor
- HDS PGM Fl Data List Informatio's it relates to A/C)
- Humidity/In-car Temperature Sensor
- Humidity/In-car Temperature Sensor Quality
- Climate Control Unit Inputs and Outputs
- Climate Control
- DTC Troubleshooting
- DTC indicator A: Climate Control Unit Internal Error
- DTC B1205 or DTC indicator B: Climate Control Unit Lost Communication with Gauge Control Module (VSP message); DTC B1206 or DTC indicator C: Climate Control Unit Lost Communication with Gauge Control Module (ECT message); DTC B1207 or DTC indicator D: Climate Control Unit Lost Communication with Gauge Control Module (ILLUMI message)
- DTC B1225 or DTC indicator A and AUTO: An Open in the In-car Temperature Sensor Circuit
- DTC B1226 or DTC indicator B and AUTO: A Short in the In-car Temperature Sensor Circuit
- DTC B1227 or DTC indicator C and AUTO: An Open in the Outside Air Temperature Sensor Circuit
- DTC B1228 or DTC indicator D and AUTO: A Short in the Outside Air Temperature Sensor Circuit
- DTC B1229 or DTC indicator E and AUTO: An Open in the Sunlight Sensor Circuit
- DTC B1230 or DTC indicator F and AUTO: A Short in the Sunlight Sensor Circuit
- DTC B1231 or DTC indicator G and AUTO: An Open in the Evaporator Temperature Sensor Circuit
- DTC B1232 or DTC indicator H and AUTO: A Short in the Evaporator Temperature Sensor Circuit
- DTC B1233 or DTC indicator A and A/C: An Open in the Air Mix Control Motor Circuit
- DTC B1234 or DTC indicator B and A/C: A Short in the Air Mix Control Motor Circuit
- DTC B1235 or DTC indicator C and A/C: A Problem in the Air Mix Control Motor Circuit, Linkage, Door, or Motor
- DTC B1239 or DTC indicator D and A/C: An Open or Short in the Mode Control Motor Circuit
- DTC B1240 or DTC indicator E and A/C: A Problem in the Mode Control Motor Circuit, Linkage, Doors, or Motor
- DTC B1241 or DTC indicator F and A/C: A Problem in the Blower Motor Circuit
- DTC B2967 or DTC indicator J and AUTO: An Open in the Humidity Sensor Circuit
- DTC B2968 or DTC indicator K and AUTO: A Short in the Humidity Sensor Circuit
- DTC B2969: Climate Control Unit Lost Communication with MICU (WIPSW message)
- Recirculation Control Motor Circuit Troubleshooting
- Climate Control Power and Ground Circuit Troubleshooting
- Radiator and A/C Condenser Fan Low Speed Circuit Troubleshooting
- A/C Condenser Fan High Speed Circuit Troubleshooting
- A/C Compressor Clutch Circuit Troubleshooting
- A/C Signal Circuit Troubleshooting
- Navigation Communication Line Circuit Troubleshooting
- Humidity/In-Car Temperature Sensor Test
- Outside Air Temperature Sensor Test
- Sunlight Sensor Test
- Power Transistor Test
- Air Mix Control Motor Test
- Mode Control Motor Test
- Recirculation Control Motor Test
- Evaporator Temperature Sensor Test
- A/C Compressor Clutch Check
- Refrigerant Leak Check
- A/C System Noise Check
- A/C System Test
- A/C Condenser Replacement
- Receiver/Dryer Desiccant Replacement
- A/C Compressor Replacement
- A/C Compressor Clutch Overhaul
- A/C Compressor Relief Valve Replacement
- A/C Compressor Thermal Protector Replacement
- A/C Refrigerant Oil Replacement
- A/C Line Replacement
- Dust and Pollen Filter Replacement
- Blower Unit Removal/Installation
- Blower Unit Component Replacement
- Expansion Valve Replacement
- Evaporator Core & Expansion Valve Replacement
- Heater Unit/Core Replacement
- Air Mix Control Motor Replacement
- Mode Control Motor Replacement
- Recirculation Control Motor Replacement
- Humidity/In-car Temperature Sensor Replacement
- Outside Air Temperature Sensor Replacement
- Sunlight Sensor Replacement
- Climate Control Unit Knob Replacement
- Climate Control Unit Knob Dial Replacement
- Climate Control Unit Removal/Installation
- Refrigerant Recovery
- System Evacuation
- System Charging
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.