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Why won't the dash vents work on my 99 Subaru but floor vents and defrost vents work fine?
most of these door systems are vacuum controlled...but a pencil or object stuck internally can also be the cause, and not often easy to fix...for the vacuum system you can find specs and routing at the local library... check all the vacuum lines on the engine, and listen for vacuum hissing under the dash...good luck..:)
What else can I help you with?
Why do you get hot air at floor and defroster vents but only cold air at the dash vents vents in a 1995 chevyvan 20?
the middle vents only supply air from the ac unit using a separate in dash fan. the floor and defrost vents come only from the heater
Why won't the dash vents work in my 95 Chevy Camaro but floor vent and defrost vent work fine?
the ducts can not be hooked up for the vents to work
Why won't the dash vents work on my 1995 Chevy Camaro but floor vents and defrost vent work fine?
When there is a problem with the vent system it dfaults to the defrost setting. Sounds like you have a problem in the doors that direct the air flow.
Why does a 2003 Crown Vic with auto temp control blow heat and ac from the defrost and floor vents but no air through the dash vents?
Because the air selector died.
Why does air blow through vents on the dash but not through the defrost vents on top when you switch the control?
When you switch the control to direct air through the dash vents, the HVAC system redirects airflow away from the defrost vents. The system uses a series of blend doors to control airflow direction, and if the defrost setting is not activated, those doors remain closed, preventing air from flowing through the defrost vents. Therefore, air is channeled exclusively to the dash vents instead.
Why wont the dash vents work in your 99 mercury sable but the floor vent and defrost vent work fine?
The issue with the dash vents not working in your 1999 Mercury Sable, while the floor and defrost vents function properly, is likely due to a malfunctioning blend door or a problem with the HVAC control system. The blend door controls the airflow direction, and if it is stuck or damaged, it may prevent air from reaching the dash vents. Additionally, there could be a vacuum leak affecting the actuator that directs airflow. It's advisable to have a professional inspect the HVAC system to diagnose and fix the issue.
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
1995 G20 Van - Why will Air Conditioning only blow out of the defrost and lower floor vents and not the dash vents?
Air flow is controlled by plastic doors which are controlled by vacume motors. Could be they're stuck, or a vacume leak.
Why would the air conditioning only blow air from the defrost and floor vents and not the dash vents on a 1996 jimmy?
This is a very common problem and you need to check for a vacuum leak, broken vacuum line or a loose vacuum line......
Air not blowing through vents just floor and defrost on a 2002 jeep?
when it happened to mine, it was because the arm behind the dash that controls the internal vent doors slipped off
The heat air and defrost do not work What is wrong?
The year, make and model info would help. Also need to know if the blower motor is working, just not getting any heat, or not changing function between defrost, dash or floor vents.
Why does your 2004 marquis air blows through defrost and floor vents and not through vents?
Grand Marquis are designed and wired so that the VAC door fails and will even cause engine not to start due to wires be connected together under dash.
