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Because the vents are vacuum operated and when u floor it the motor losses vacuum
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∙ 12y ago
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Do you know what the noise is under the passenger side dash sounds like a vacuum problem?
probably an actuator vacuum operated to open/close heat vents
What is a vacuum actuator under dash Defros?
Acutator is a small vacuum powered motor used to open and close diverter to direct air either to defrost, floor, or vents
Do you open or close vents in the summer?
leave it open all year closing it during the day open at night for ac
All windows and rear vents in 2000 Sienna not working is there a fuse?
There is not a fuse that controls the air to your vents in your 2000 Toyota. The vents are controlled by blending doors. The doors open and close to direct air to the desired location.
How do you change the air conditioning vents to the correct position?
AC VENTS are in the correct position if they are open and free flowing. Some systems have a heat and an AC position for the vents. The AC position is so the cool air discharges from the vents higher on the walls or from the dash rather than floor or windshield in a car.
Where is the fuse box on your 1998 previa?
top center of dash board there is a small button just above the heater vents to pop it open
Is it better to leave all the furnace vents open even if you don't use that particular room very much or is it better to close the vents in that room?
I close the door and vents to rooms I don't use on a daily basis because I don't want to heat rooms I am not in. That can get expensive and it's not "green".
When a red dash is upgraded to a red x what are the requirements?
close out original red dash enrty and rewrite the original entry in the next open
Your 1999 astro van how do you get the dash board vents to open it stays in the defrost mode how do you fix this?
defrost is the default mode. in most cases a vacuun leak is the culprit.
Why does the ac unit shut down on high acceleration on your 1997 jeep wrangler?
It is in the computer programming to turn the compressor off on wide open throttle accelerations. If you problem is the airflow moving from the vents to the dash on hard accelerations, you have a vacuum leak to the dash.
Where is the switch to open sunroof on 1984 190E Mercedes?
There are two possibilities. Its either on the overhead console by the rear view mirror or on the center dash control switches below the heater vents.
How do you fix an air conditioning problem where most of the air gets directed to the floor vents instead of the main vents and defrost vents in a 2000 Chevrolet Malibu?
When you adust the switch on your dash to direct the heated or cooled air you are actually switching vaccum to vaccum servos that open and close the doors within your heating/cooling system. If you drop your glove box door you can see behind it to witness this happening. You may need to remove some of the plastic dash covers also which is easy to do.You may have a bad vaccum line, vaccum switch or if they are all working, you may have a broken door within the system.
