Question about 2005 Buick Rendezvous
I ahd the same issue and just had to bleed the air out of the system. Use the bleeder valve on the top of the intake tube, you cant miss it. Stat your car and open that valvethe air/steam will start to come out. Keep that open until you get coolant flowing out of there and then close it. Took me about 5 min. and heat works fine. Please rate my answer to let me know if that was any help. Thanks
Posted on Dec 19, 2009
What temperature do you consider as Overheating? The Rendevous is essentially the same as a Pontiac Aztek. Thess vehicles were made in Mexico. All recent vehicles operate at coolant temperatures up to and including 250 degrees F safely. Obviously you have more than one problem! First, was the cooling system purged of all AIR following the Thermostat Replacement? If not, then have this done before any further attempt at diagnosis. There are small brass Bleeder Valves located at strategic points on these vehicles and in plain sight. Second, if there is no AIR in the Cooling System then, and only then, should one proceed to check for Thermostatic Fan controls. The Fans (Yes 2 of them) are controlled by thermostats located at strategic points in the Outlet side of the Cooling System and may be additionally controlled by a Relay actuated by the Air Conditioning when in A/C mode which override the Thermostatic Fan Switch.
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
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