The heat isnt blowing through the vents.

Ricardo Loranca

• 552 Answers
• Posted on Dec 05, 2008

SOURCE: heat only blows out of dash vents, will not blow out of defroster

vvacum leak. in back of your temp control unit there is a series of vaum lines attached together they might even be in different colors these lines go to the vent and they open and close them when you slide the lever over this piece needs to be replaced

SOURCE: air will not blow out the vents

Sounds like the hvac doors are not moving when the dial is switched. These are usualy vaccum operated and the switch is under the dash behind the glove compartment. You probably need a service manual to know which lines run the door that controls where the air comes out, but you might only have a vaccum line pulled loose.

SOURCE: How or what do I have to do to get the air to blow

Hello nuttierthenu...Chrysler issued a TSB (technical service bulletin) on this problem to correct the issues it was having on the Stratus and the Cirrus.....
The mode door actuator, located in the A/C-Heater housing, is controlled by the Body Control Module (BCM) . When the operator requests a mode of operation, the BCM processes the signal from the control head and actuates the mode door to the proper position.
The good thing is the Body Control Module (BCM) will store a DTC for this system but the bad thing is you need the Chrysler DRB scan tool to get them.

There is a TSB out on this problem.
TSB NO: 24-12-95
GROUP: Heater & A/C
DATE: Aug. 18, 1995
SUBJECT:
HVAC System Stuck in Defrost Mode
MODELS:
1995 (JA) Cirrus/Stratus
SYMPTOM/CONDITION:
HVAC system stuck in defrost mode. May be intermittent. DIAGNOSIS:
Check Diagnostic Trouble Codes (DTC's) in the Body Control Module (BCM). If no DTC's exist and vehicle is no longer stuck in defrost, perform all steps in the repair procedure (Steps 1 through 5).
For a "HVAC Mode Door Feedback Failure", proceed to step # 1.
For a "HVAC Control Head Input Shorted To Ground/Shorted To Battery", refer to the 1995 Cirrus/Stratus Body Diagnostic Procedure Manual (Publication No. 81-699-94029), Section 7.0, "Manual A/C System".
PARTS REQUIRED: AR 4864052 Wiring Connector Repair Kit, Mode Actuator Connector AR 4644834 Actuator, HVAC Mode AR 4856997 Body Control Module, Vendor Part, Order on DIAL Function 11 AR 4864311 Wiring Connector Repair Kit, HVAC Control Head Connector REPAIR PROCEDURE:
This bulletin involves testing and replacing the HVAC Mode Actuator/Connector, Control Head Connector, or Body Control Module as necessary.

1. Check Mode Actuator connector (C215) for full insertion/locking into Mode Actuator and spread terminals. Repair as necessary. The terminals in question are referenced on Page 8W-80-27 of the 1995 JA Service Manual (Publication No. 81-270-5121). In connector C215 check cavities #2 through #4. A visual check is not sufficient. A .0044" pin gauge is required. Repair any spread terminals with wiring connector repair kit P/N 4864052. Replace HVAC Mode Actuator P/N 4644834.
   
2. Check BCM P/N. If it is not P/N 4856997, replace. Proceed to step # 4.
   
3. Check HVAC Control Head connector (C204) for full insertion/locking into Control Head and for spread terminals. Repair as necessary. The terminals in question are referenced on Page 8W-80-23 of the 1995 JA Service Manual (Publication No. 81-270-5121). In connector C204 check cavities #5 and #8. A .0040" pin gauge is required. Repair any spread terminals with wiring connector repair kit P/N 4864311.
   
4. Check battery voltage. If not above 11.5 volts, charge battery. Check for charging system problems. Perform "On Vehicle Battery Test Procedures" as outlined in section 8A of the 1995 JA Service Manual.
   
5. Assure ignition is off and key is out. Pull IOD fuse (10A, cavity #5 in Junction Block). Do not replace for a least 1 minute. This will clear all BCM faults and cause the HVAC to re-calibrate when ignition is turned to the "RUN" position.