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2007 Buick Rendezvous CX FWD 4dr *Ltd Avail*

2007 Buick Rendezvous
Trim Info:
Front Wheel Drive, 4 Door, 2WD Sport Utility Vehicle
19 mpg city / 26 mpg hwy
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January 26, 2011, 4:29 am


Question: 2003 Buick Rendezvous heater does not put out hot enough air?

My 2003 Buick Rendezvous does not put out a high volume of hot air. I replaced the heater core and thermostat, it still does not put out hot air like it did before. I have torn it apart 2 times since trying to figure out what the problem is. Any suggestions would be greatly appreciated since this is not an easy car to work on.

February 1, 2011, 7:52 am

Elizabeth K

Does the engine get up to normal operating temperature? If not, you have to fix that first. If the engine is warm, check the heater hoses (in and out) to see if they are hot. Check that there is not a valve shutting off the flow to the heater core. Next, bleed the system of air--remove the radiator cap (when cold) and start the engine. Run it with the cap off until the thermostat opens and you can see fluid moving through the radiator. Top off if necessary, replace cap.

If the heater core is getting hot and the air is not, then check your vent system for a blend door/actuator stuck.

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