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Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 11267
Experience:  ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
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2005 chevy impala: no heat the hoses are hot coming..hvac

Customer Question

I have a 2005 chevy impala no heat the hoses are hot coming in and out of the hvac case.
Submitted: 5 years ago.
Category: Chevy
Expert:  Randall C replied 5 years ago.
hello, do you have dual zone heat/cool ? also, does the AC work?
Customer: replied 5 years ago.

yes it does have a dual slide bar and the ac does work

 

Expert:  Randall C replied 5 years ago.

Is heat coming out on passenger OR driver side?

Customer: replied 5 years ago.
some heat is coming out of passenger side.
Expert:  Randall C replied 5 years ago.
Ok, you have 2 small electric motors called actuators. there is one for the pass and one for the driver,. the driver one has most likely failed. very common problem. I will send location and repair info in next post to you. This is basically the only thing it can be as both side share the heater core. If both hoses are hot, the coolant is flowing. the only other thing could be partially blocked heter core. That would be rare for a 2005. the actuators were the big problem. that info is coming next
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 11267
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
Randall C and 7 other Chevy Specialists are ready to help you
Expert:  Randall C replied 5 years ago.

AIR TEMPERATURE ACTUATOR REPLACEMENT - LEFT

REMOVAL PROCEDURE

  1. Remove the left instrument panel (I/P) insulator.
  2. Remove the knee bolster bracket bracket.
  3. Disconnect the electrical connector from the left air temperature actuator.
  4. Remove the mounting screws from the left air temperature actuator.

  1. Remove the left air temperature actuator.

INSTALLATION PROCEDURE

  1. Position the left air temperature actuator. Align the slots in the electric actuator driver to the flats on the shaft.
  2. Align the locating hole to the alignment pin on the HVAC module case.
  3. Slide the actuator on the shaft. The actuator driver should seat completely onto the shaft and the mounting holes should be flush with the mounting screws on the HVAC module case.
  4. Install the mounting screws to the left air temperature actuator. NOTE: Refer to Fastener Notice in Service Precautions. Tighten the screws to 1.5 N.m (13 lb in) .
  5. Connect the electrical connector to the left air temperature actuator.
  6. Install the knee bolster bracket bracket.
  7. Install the left I/P insulator.

    Bulletin No.: 07-01-39-002B

    Date: September 07, 2007

    ENGINEERING INFORMATION

    Subject:
    EI07091 - A/C Not Cold Enough, HVAC Mode Doesn't Change, Heat Not Hot Enough, B0409, B0419, B0269, B0249, B0408, B0268, B0418, B0248, B0414, B3749, B0424, B3748 (Actuator Diagnosis)

     

    Models:
    2004-2005 Chevrolet Impala, Monte Carlo

     

    Supercede:

    This bulletin is being revised to cancel the need for technician feedback and to provide corrective action. Please discard Corporate Bulletin Number 07-01-39-002A (Section 01 - HVAC).

    Condition

    Customers may comment about any of the following conditions:

    A/C not cold enough - A/C blows warm

    Heater not hot enough - heater blows cold

    Temp door does not move

    Correction

    Following the actuator diagnostic information found in SI (Service Information). Replace the actuator as necessary.

    Warranty Information

    Select the appropriate labor operation from the Labor Time Guide based on the repair made.

Expert:  Randall C replied 5 years ago.
I included a TSB which indicates the problem is common in the last post so be sure to read info at the bottom. Thanks

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