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Jim
Jim, ASE Certified Technician
Category: Chrysler
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Experience:  ASE Certified A6,A8,L1 and California Licensed Smog Technician
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2004 Chrysler Sebring: it blows cool/cold air..dials..floor to defrost

This answer was rated:

My 2004 Chrysler Sebring heater works about 30% of the time. The other 70% it blows cool/cold air. Also without my touching the dials will change from floor to defrost on its own quite often. This morning I noticed that it switched from heat at the floor over to cool air up on the defrost while I was accelerating up a hill. Any help would be great.
Curtis in Branson

There is an update that needs to be done to this vehicle that may correct your problem, here is a copy of the update.

NUMBER: 24-002-04 REV. A
GROUP: Heating & A/C
DATE: July 30, 2004

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 24-002-04, DATED
MARCH 30, 2004, WHICH SHOULD BE REMOVED FROM YOUR FILES . ALL
REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES ADDITIONAL
MODEL YEAR.

SUBJECT:

A/C and Heater Performance

OVERVIEW:

This bulletin provides diagnostic information for A/C and heater performance complaints.

MODELS:

1998 -2004 (LH) LHS/300M/Concorde/Intrepid

2001 -**2005** (JR) Sebring Convertible/Sebring Sedan/Stratus Sedan

NOTE: Perform Customer Satisfaction Notification no. 857, reprogram Powertrain
Control Module (PCM), for 2000 model year LH-vehicles built prior to August
30, 1999 (MDH 0830XX).

SYMPTOM/CONDITION:

Erratic operation of the A/C and heater systems including:

  • Lack of cold air
    Lack of hot air
    Unrequested mode change -Automatic Temperature Control (ATC) only)
    No control of mode or temperature control
    Tapping noise from blend door
    The above Symptoms may be accompanied by the following Diagnostic Trouble Codes
    (DTCs):
  • Blend door feedback
    Blend door stall
    A/C control mode door input shorted to battery
    Mode door stall
    In car temp sensor failure
    ATC messages not received

    24-002-04 REV. A -2


DIAGNOSIS:

  • Do not attempt to remove A/C control until after this entire Diagnosis and Repair

    Procedure has been performed.
  • Verify customer reported symptom(s) if possible.
  • Check for the presence of DTCs with the scan tool (DRBIII®) and record on the

repair order. If a DRBIII® is not available reference the appropriate Service Manual Heating
and Air Conditioning "Self Diagnostics" procedure and record any present
DTCs on the repair order. If Symptoms and/or DTCs other than those listed above
are present, repair as necessary. If a Symptom(s) and/or DTC(s) listed above is
present, perform the Repair Procedure.
REPAIR PROCEDURE:

 

1. With the vehicle at room temperature 10°-27° C. (50° to 80° F.), remove the M-1 circuit
fuse for ten minutes to erase DTCs.
2. Install the M-1 fuse and start the vehicle, this will initiate the HVAC system calibration.
Allow approximately five minutes for the calibration to complete.
3. Operate the vehicle and HVAC system to verify that Symptoms and/or DTCs are gone.
If tapping noise or Blend Stall/Feedback DTCs re-occur, additional diagnosis will be
required.
POLICY:

Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: Description Time
24-50-09-90 Recalibrate HVAC Control Assembly 0.3 Hrs.

FAILURE CODE:


XX Service Adjustment

Jim and 4 other Chrysler Specialists are ready to help you
Customer: replied 7 years ago.
Thank you for your response, under Repair Procedure: #1 advises me to remove the M-1 circuit fuse for ten minutes to erase DTCs.
Then...2. Install the M-1 fuse and start the vehicle, this will initiate the HVAC system calibration.
Question... Is the M-1 cicuit fuse easily accessible by chance?
I am sorry for not getting back to you, I have been experience problems with my computer on getting messages. Do you still need this information?
Customer: replied 7 years ago.
Yes, I still need to know if the M-1 is fairly easily accessible, and how to get to it.
Curtis

It is in the main fuse block inside the car driver side. It is the 30amp number 1 fuse.