Symptoms - HVAC Systems - Manual. Buick Rendezvous

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2006 🢒 Rendezvous - AWD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Symptoms - HVAC Systems - Manual

Important: Review the system operation in order to learn the system functions. Refer to the following procedures:

•	Air Delivery Description and Operation

•	Air Temperature Description and Operation

•	Inspect for aftermarket devices which could affect the operation of the HVAC System. Refer to Checking Aftermarket Accessories .

•	Inspect the system components which are easily accessible or visible for obvious damage or for conditions which could cause the symptom.

•	Verify the A/C compressor clutch turns freely and is not seized.

•	The A/C compressor will not operate in cold, outside air temperatures. Refer to Air Temperature Description and Operation .

•	The following conditions may cause window fogging:

-	A wet carpet

-	High humidity

-	An interior water leak

-	A blocked drain tube to the A/C evaporator

-	Maximum passenger capacity

-	Blocked body pressure relief valves

•	Inspect the air distribution system for causes of reduced airflow:

-	An obstructed or dirty passenger compartment air filter

-	Blocked or damaged air vents

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to one of the following symptom diagnostic procedures:

•	HVAC Compressor Clutch Does Not Engage

•	HVAC Compressor Clutch Does Not Disengage

•	Blower Motor Always On

•	Blower Motor Inoperative

•	Blower Motor Malfunction

•	Too Hot in Vehicle

•	Too Cold in Vehicle

•	Air Delivery Improper

•	Air Recirculation Malfunction

•	Leak Testing

•	Defrosting Insufficient

•	Noise Diagnosis - Blower Motor

•	Noise Diagnosis - Air Conditioning (A/C) System

•	Noise Diagnosis - HVAC Module

•	Odor Diagnosis