Question about Pontiac Cars & Trucks
Have you checked your actuator ? Internal mechanical / electronic flap that allows warm coolant from engine to run inside your car into heater core.
With vehicle at operating temperature, touch both heater hose inside engine compartment by firewall. They should both be warm/hot if actuator is good. If one is cold, bad actuator or clogged heater core.
Posted on Dec 07, 2016
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Posted on Jan 02, 2017
check the heater hoses and if both are hot then the mode door is broken
i have replaced 2 in the torrents(not a nice job)
Posted on Jun 21, 2009
also check to see if tube that runs your climate door is not pinched or broken. the vaccum tube that runs the climate door is behind and under the battery. i had same problem a year ago and the tube was partially cut. i fixed it by cuttinga piece of aquarium tubing and spliced it back together. one other thing.....check to see if your radiator over flow cap is tight. your cap maybe bad and or cracked this would also cause the problem.
Posted on Jan 29, 2010
SOURCE: 2006 Pontiac Montana SV6 Front
First off make sure the thermostat settings are set the same on the control panel for both front and rear units if thats ok it could b a few possibilities. 1 pluged heater core in rear 2 blocked heater hose try looking into these and see if it helps any
Posted on Dec 10, 2010
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