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Heat system is not working properly

(2002 Dodge Grand Caravan)
in Bothell, WA on February 14, 2009
My Caravan 01 it has a problem with heat system,just work with right side ,left side (passenger side) is cold always
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Popular Answer
on February 22, 2009
Is your vehicle equipped with Dual Zone Temp Controls? (separate Driver/Passenger Temperature Control) You do not mention what mode the system is in, ie; heat, defrost, vent etc. If air is blowing out of all dash vents with the exception of the temperature, the problem is likely due to the "Blend Air: doors in the Heater Housing. Same is applicable for the Floor Vents. If heater floor outlet temperature cannot be adjusted with the heater-A/C control temperature control, one of the following could require service: Blend-air door binding, Faulty blend-air door motor, Improper engine coolant temperature, Faulty heater-A/C control. A dealership can also connect a diagnostic tool DRB3 and perform a system check of actuator operation and perform a simple calibration procedure to Isolate the problem. Also, if this involves the floor vent, make sure the air ducts are attached to the heater housing.
on February 16, 2009
It's either the system that controls the vent flaps, or the vent control flaps themselves.
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