Why does the 2010 HHR heat/cool and vent change controls have no response?

SOURCE: No dashboard heat output

The climate control was poorly designed on these cars.

There is only heat on the floor and defrost settings, due to the layout of the ductwork.

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Greg Bernett

• 2993 Answers
• Posted on Apr 18, 2010

SOURCE: location and removal of the air vent actuator

Removal & Installation

1. Remove the floor air outlet duct extension from the floor duct.
   
2. Remove the center console, if equipped.
   
3. Remove the screws from the center console duct, if equipped.
   
4. Remove the center console duct, if equipped.
   
5. Disconnect the electrical connection at the mode actuator.
   
6. Remove the mode actuator mounting screws from the HVAC module.
   
7. Remove the mode actuator as an assembly with the actuator cam.
   

1. Install the mode actuator as an assembly with the actuator cam.
   
2. Line up the heater/defroster valve lever with the mode actuator cam slot.
   
3. Line up the A/C valve lever with the mode actuator cam.
   
4. Install the mode actuator mounting screw to the HVAC module and tighten to 14 inch lbs. (1.6 Nm).
   
5. Connect the electrical connection at the mode actuator.
   
6. Install the center console duct, if equipped.
   
7. Install the screws to the center console duct, if equipped, and tighten to 14 inch lbs. (1.6 Nm).
   
8. Install the center console, if equipped.
   
9. Install the floor air outlet duct extension to the floor air duct.
   
10. Calibrate the HVAC module actuators.
    

SOURCE: Heat wont blow through heater or defroster vents

Had the same problem. believe it or not i changed the gas cap and got heat all around. something about pressure.