I posted a problem about my heating issue on 10/4/11 and the only response I got was from Master Tech. 108 people have read the post. The controls are electronic and I feel sure that someone else out there has had the same problem. I can buy a rebuilt unit but I would like to know from you experts out there how you truoble shoot a unit like this. I have read that a time you can resolder a circuit. I need some response please. I love to do things like this myself instead of hiring it done. I have read several post on this forum and I know the experts are out there. Thanks in advance. Jack

 

you might just need to recalbrate the control assembly. supposedly the m-1 fuse there talking about is the #1(30 amp fuse) fuse inside drivers door thats what i've been told.here is a tsb that might help


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/Intrepid2001 - **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

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(R)) and record on the repair order. If a DRBIII(R) 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.

 

I finally found the actuator that opens and closes to regulate the heat in the car. The panel under the glovebox has to be removed to see the motorized damper. I could not get the wire unplugged so I loosened the screws that hold the little motor so that I could get the arm loose to move it to the heat position. I still do not know if the actuator is bad or the **** mechanisim is not sending voltage. I hope that if some of you experts read this post you can send a wiring diagram. I needed to get the heat on for my wife to drive. The actuator acts as a positioner for heat.

 

if you want to send me a private message with an email address, i can send you the diagrams that i have ,can't put them on here pictures don't work right. did you try to recalibrate the control assembly(body control module) yet