Question about Buick Cars & Trucks
I believe the heater actuator needs to be replaced in my 2007 Buick Lucerne. Blowing cold air on passenger side and if I put on internal recirculation it blows some warm air. I was told to disconnect the battery for a minute or so and this didn't help. How hard is it to replace the actuator on the passenger side. Please tell me the dash doesn't have to come out. Thanks in advance. Gary
Check basics first: is there hot water being fed to the heater core?,does the valve work (open/close)that feeds water circulation to the heater core????. Hope this helps. Alberto
Posted on Feb 10, 2014
Testimonial: "As I meant to in my first post (sorry I didn't) the drivers side is getting hot but not the passengers side. This is telling me the core is getting hot and circulating the coolant through the cooling system."
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Posted on Jan 02, 2017
SOURCE: heater blowing cold air
squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.
Posted on Jan 04, 2009
the temp door is located in a box behind the glovebox, the actuator is either under or above the box. if you remove the glove box you should be able to see it.
Posted on Feb 03, 2009
Actuator motors either get a tear in the rubber or a hose is broken and not letting vacuum assist in its opening.
You can try moving the lever by hand and see if the air gets colder on the bad side.
Posted on Aug 04, 2009
you cannot repair the actuator you need to replace it with new one. These motors turn but get weak with time. if you test it, it works, put it in and it doesn't. this is because the motor is weak, unfortunately GM does not sell these motors separately.
Posted on Aug 23, 2009
Removal & Installation
Mode actuator location
Posted on Apr 18, 2010
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