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2019 Dodge Grand Caravan 3.6 Rear AC

2K views 3 replies 3 participants last post by  drsugerman75 
#1 ·
37k miles
Rear ac isn’t blowing cold air, temperature is around 60°-65°
Front ac is working fine, around 32°-35°
Tested rear blower motor actuators and they are working fine, blower motor resistor and expansion valve are brand new (OEM)
AC lines are fine there are no leaks. Low side line gets cold but the one going to the rear expansion valve is at room temperature (the line is not clogged)
Here is a link with the gauges readings
AC Gauge Readings

Wire Cable management Electrical wiring Technology Cable

My English is not that good, I’m explaining the best I can
 
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#3 ·
Mode damper motor inside rear blower housing has probably failed. Must remove rear blower and you’ll see the blend door motor. Need to make sure BCM is sending signal to open blend door in both AC and heat modes. If it is then either blend flap is stuck/siezed or blend motor is faulty. If no signal either LSD bus between motor and AC head is at fault or has shorted wiring or AC control head is bad.
 
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