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2009 Pontiac G6 heater is blowing cold air, what should be checked?

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If your coolant level is good, check the resistors, the blend door, the actuator (if you hear a popping/knocking sound). Are your windows fogging while you try to operate it? Check your heater core

Posted on Jan 03, 2017

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2009 pontiac g6 heater blows cold


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.

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