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1999 Jeep Cherokee 1999 Jeep Grand Cherokee HVAC issues

Tiny
MARKYZ
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 267,000 MILES
I have a 1999 Jeep Grand Cherokee with the Dual Zone Climate control system. When I turn on the AC, I get cold air out of the Driver's side but scorching hot air out of the Passenger Side. The Passenger side temperature controls are not responsive. I also noticed hot air seeping out of the passenger side when I have the HVAC system off. I ran the error codes and got the following:

16 = Right temperature door not responding
42 = One of four motor drivers had drive 9A9 shorted to ground
52 = AI (Recirc) door travel range too large

Do you know what these codes mean and how I can rectify the issue?
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Thursday, May 27th, 2010 AT 1:19 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
16 means the actuator for the temp blend door on the right is not moving, this could be that the actuator is dead(common) or there is a short in that circuit.
42, could be a short in the previous actuator wiring, or actuator motor.
52, probably means the connecting gear or arm ont the recirc actuator broke, and the movement is beyond normal range. Check the actuator motors.
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Friday, June 4th, 2010 AT 7:49 PM

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