Blows warm air on Drivers side-cool on passenger side
1998 Intrigue, I have checked the servo motors and both sides move 1/4 turn as temp is turned up or down, they appear to be working. I have also blocked the heater hose so hot water is not entering the heater core, but still warm on driver side, cool on passenger side.
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www.hyundai-forums.com/.../294097-drivers-side-blows-hot-air%3B-pa... Jul 29, 2014 - 3 posts - 3 authors
I soon noticed that the driver's side blows warm air and the passenger side blowscold air as it should. No amount of adjusting the temp control ...
www.odyclub.com/.../46646-hot-air-driver-side-vents-cold-passenger-si... May 9, 2012 - 16 posts - 10 authors
I have a 2009 EXL Odyssey that just is doing the same thing (warm air on drivers side, cold on passenger). I checked freon levels and ...
There are 2possibles ,1. The heat / cool slide control is defective, it is not possible to repair. Most likely the servo motor that opens and closes the air vent that gives you heat or cool is stuck. Open your glove box and you will see 2 rubber tabs that hold the door at the open and down position. Push down on your glove box door until it swings all the way down (this wil be past normal open) up inside you will see a metal rod affixed to a arm that pivots via the servo left is full vent(cool) right is full heat. Push your hot/cold heat selector and see if it moves. It may not be moving its full extension. If your not sure push it right and you should get heat push it left and you should get cool check YouTube this is a common problem for this era of Buicks, good luck Bret
Two things could be the problem.One is the freon could be low.The other is a actuator motor that controls the temp door for that side is not closing the door all the way.If it is the actuator motor,then it could be a job for a mechanic to do,it can be hard to repair,labor wise.If I can help let me know please,but check freon first,this can cause the problem also.
before you tear apart the dash to get to your driver side servo motor-disconnect your battery for 5-minutes, with both front doors open reconnect your battery(this resets your on board computer),then turn your car on and turn your a/c on to high with the coldest setting on both sides for dual air systems and leave the car running for a few minutes. you will feel the air cold again. there is a sensor on the passenger side that will trigger the servo motor to not move if the front door is closed. servos usually get stuck after the power was cut off. if this does not do it, have your a/c sytem checked for leaks.
this is also worth considering:
Dual Climate System. If you're not familiar with this setup, there's a driver and passenger climate setting. The passenger setting knob is on the right of the climate control console. If you have already properly adjusted this setting, there's a problem with the servo motor being out of the preset range for the a/c & heater doors. Every time power is cut from the unit, the servo resets the doors by doing a "sweep" from full cold to full hot maximum range. Over time the servo will fall out of range from constant full range flexing, and the part that controls the range limit must be replaced. Reseting the main module by disconnecting the battery has a slim chance of successfully fixing the issue.
1. If it worked fine recently, I would suspect low r134a charge. 2. If you have dual zone heating/cooling, your mode motor may be out on the driver's side. Switch the temp up an down slowly and check under the dash for the actuators to move. If one side moves but the other does not, you have found your problem.
you have two seperate blend boors in yous HVAC system the one for the passanger side sounds like it isn't actuating. it is controled by a servo motor this motor sounds like it needs to be replaced. Hope this helps you.
Is it leaking antefreeze?
The thermostat might be gone or needs a bigger thermostat
It could be a vaccum leak for the drivers side blowing cool air and the passenger side blowing warm air
Does it have dual air control switches one for drivers side and one for passengers side?
Sounds like a problem with the "Drivers side temp actuator motor".
Each side has a motor that controlls the temp. door inside the dash for the driver or passenger side. These motors are approx. $75, plus 1 hr. labor to install. See more info here... http://www.greatautohelp.com/more-buick-questions.html