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2010 Buick Enclave drivers side heater and air work fine.passenger side will only blow cold ,replaced actuator on passenger side still blowing cold only
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All these things are vacuum actuated and must have vacuum thru the lines to make the blend doors/flaps work properly to make the air go where you wish it to go. Check that all vacuum lines are connected to these actuators properly and that they are getting vacuum to them from the control panel. Vacuum to control panel must come from the engine to a reservoir, a black plastic ball on the passenger side at firewall under hood and from reservoir thru firewall to control panel. Check that you have vacuum at all connections.
The most common cause of this is that you have a stuck air temperature control blend door, this can be a motor actuator issue or a jammed door or both (common). To replace both parts you will need to completely remove the dash from the car to access the blend door.
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
THIS IS A GUESS. Both sides probabley have "mix" dampers that regulate temp by mixing hot and cold air to make you comfortable. Passenger side must not work properly, stepper motor? Dirty actuator? Temp sensor on passenger not working? Don't honestly know but I'm not sure a do it yourselfer could figure it out. Sounds complicated.
sounds like the drivers temp door actuator is not working should be located on the drivers side of the air box down by the gas pedal or center dash area
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