Own a 2005 Dodge Durango. On a recent 4-hour trip, the A/C appeared to go out in the driver and passenger side after about 30 minutes into the trip. The rear A/C continued to work fine. I put the fan on high and very little air came out and what small amount did was not cold. The rest of the drive was not comfortable.

After a short stop (about one hour), I returned home. I tried the A/C again and this time it worked. It was not freezing cold but cold enough to offset the 90 degree weather outside. Out of curiosity, I switched it to heat for a minute or so and the air turned warm for awhile. Then the warm air turned to more neutral or general air, not hot or cold. I switch it back to A/C and it kept me relatively comfortable for the rest of the trip home.

Any ideas what the problem may be and suggestions? rw

 

Here is a TSB that may help.

SUBJECT:
No A/C Or Evaporator Freeze Up On Long Trips With Blower In Low Speed Position
OVERVIEW:
This bulletin involves adding a resistor 470 ohm resistor in the evaporator temperature
sensor signal circuit.
MODELS:
2004 - 2009 (HB) Durango
2007 - 2009 (HG) Aspen
NOTE: This bulletin applies to all HB/HG vehicles with A/C (sales code HAA or HAB
or HAF). This bulletin does not cover the 2009 HG HEV vehicle.
SYMPTOM/CONDITION:
The customers may experience poor A/C, little to no A/C operation or reduced airflow from
the instrument panel vents. This condition often occurs after a extended drive cycle
(greater that 2 hours) with the A/C on and the blower speed is set to the low position. Once
the vehicle is shut off or the A/C is turned off for approximately 2 hours the A/C will operate
normally.
Adding the resistor to the evaporator temperature sensor signal wire allows the A/C
Compressor to cycle at a higher temperature more frequently to avoid this condition.
DIAGNOSIS:
Using a Scan Tool (wiTECH™ or StarSCAN®) with the appropriate Diagnostic Procedures
available in TechCONNECT, verify all A/C systems are functioning as designed. If DTC's
are present record them on the repair order and repair as necessary before proceeding
further with this bulletin.
If the above condition is present, perform the Repair Procedure.
NUMBER: 24-004-10
GROUP: Heating & Air
Conditioning
DATE: April 7, 2010
PARTS REQUIRED:
Qty. Part No. Description
1 68081530AA Kit, Resistor
Kit includes; 1 470 ohm resistor, 2 wire shrink wraps and
2 splice crimps.
REPAIR PROCEDURE:
1. Remove and disconnect the ATC or MTC control head. Follow the detailed service
procedures available in DealerCONNECT/TechCONNECT, Refer To Group 24 -
Heating & Air Conditioning > Controls, Front> Controls, A/C & Heater Removal
Procedures.
2. Using the wiring diagrams available in DealerCONNECT/TechCONNECT locate the
evaporator temperature sensor signal wire. Cavity 10 of the C2 black 12 - way
connector for ATC systems. Cavity 2 of 20 - way black C1 connector for MTC systems.
3. Measure 76mm (3 inches) down from end of ATC/MTC connector and cut the
evaporator temperature sensor signal wire.
4. Using the 2 splice crimps and 2 wire shrink wraps from resistor kit p/n 68064996AA,
splice in the 470 ohm resistor.