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Passenger side has low heat on 2003 Buick Rendezvous?

This problem is very much noticed with vehicle having dual climate control.
On 2003 Buick model,there is no dual climate control.
Even though it has no  dual climate control there are still separate actuators for each side. Most likely the right side actuator has failed on you.

Remove the glove compartment  and you can access and remove this actuator. Then you can open the door manually and see if you have heat. If so then the actuator is bad. If not then you have a problem in the air box itself.

See the diagram below for Actuator.

graphic


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For car AC related and Heater related solutions. You can refer the options mentioned below:---

Car AC Blows Warm Air ?


How to test AUTO AC pressure?


AUTO Air Conditioning Troubleshooting?



AUTO A/C COOLING PROBLEM?


Fixing refrigerant leak?


How to locate Car AC Refrigerant leak?


CAR AC INTERMITTENT COOLING?


What causes INTERMITTENT COOLING on Car AC system?


Car AC making Noise?


BAD ODOR ON CAR AIR CONDITIONER?



How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html

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