AC blowing through defrost vents
The AC is only blowing through the defrost vents in the front. The air will come through the proper vents every once in awhile. In addition, the passenger's side door window and lock are not working, the adjustable side mirrors aren't working, and the van shudders when you change gears sometimes. Also, after the van has been running for a while, the van creaks badly in the front while turning.
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So maybe we should start with what problems you don’t have. Just Kidding. Let’s start with the Defroster. The problem is probably the vacuum box under the hood may be damage or a vacuum line connecting to it could be damaged. The switches on that model is actuated by a vacuum motor. If you look under the hood near the driver side there will be a box with a hose attached. That box is for the defroster door motor vacuum reservoir and the hose may be missing, damaged, or the check valve may be worn out. I would recommend having a certified mechanic come out and troubleshoot further since it is possible the defrost motor needs replacing. For your door locks, window, and mirrors not working it sounds like there may be a damaged wiring harness going to the door or the motors that actuate them may be worn out. A technician can look at the wiring and test voltages as well. The shutter does not sound good. You may need to go to a transmission specialist do have them determine what the problem is but they are going to probably tell you you gonna need a new transmission soon. Last of all the creaking from the front end could be several things. A tie rod end, Lower or upper ball joint, Brakes or even struts. A technician can assess the situation and determine exactly where the problem is.
How to Identify and Fix Common car Problems ?
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Check the vacuum hose on the blend door and see if it has came off or broke. For the rear defroster, check the switch to the defroster and make sure that it has power to it and power coming out. If there is no power to the switch, then check the fuses and see if any of them are blown.
The default position is defrost (windshield vents), meaning that if you loose vacuum supply it changes to defrost position. Look for a vacuum hose going through the firewall and trace it to where it hooks up to the intake manifold. It goes through a one way check valve and it teed into a vacuum canister.
One of the simplest reasons your AC is only working in certain rooms is vent obstructions. This issue can take three different forms: Closed vents: As you might expect, air can`t blow through a closed vent. Check the settings on your vents to ensure they are not preventing air from being released into your room.
The mode door actuator controls which vent(s) air blows through. The door on this actuator has two positions: closed and open. Today, most actuators are controlled electronically. As actuators wear over time, the plastic gears inside may be stripped or broken, causing them to fail.
Air conditioning in your car is a great thing to have during the summer, but did you know that it can also help keep you safe in the colder months too? Your AC systems actually helps keep your windows defrosted when it is cold out.
And, yes, turn on your car`s air conditioner, since that system also serves as a dehumidifier. By turning on the A/C, you will effectively dehumidify the air from your defroster before it is warmed.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
My ac only blows through defrost vents
ANSWER : Hello. From the symptoms you’ve described it would appear to me that the vehicle may have more than one problem.
The hissing coming from the AC condenser may be a sign of a potential leak, especially if it occurred after you added refrigerant. I’d check to make sure the refrigerant is at the correct level and that there are no leaks present, as any AC refrigerant leaks can cause problems with the functionality of the AC system.
In regards to the air only blowing from your defroster vents, I would check the vehicle’s AC mode switches, and blend door actuator to make sure they are operating soundly. The AC switch controls the modes that the AC blows through, so any issue with the switch may cause problems with what vents the system can operate from.
The blend door actuator is the component that mechanically selects what vents the AC system works through, and if it fails or gets stuck, can produce the symptoms you are experiencing.
If you need assistance with these checks, see the help from a certified mechanic who can diagnose your AC issue firsthand and fix it accordingly.
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My AC is only blowing through the defrost vent and rear defrost doesn’t work.
ANSWER : Hi there. The blend doors on your vehicle are operated by a vacuum hose. Check the vacuum lines to the engine and see if any of them are broken, has a hole, or is disconnected. Check the vacuum hose on the blend door and see if it has came off or broke. For the rear defroster, check the switch to the defroster and make sure that it has power to it and power coming out. If there is no power to the switch, then check the fuses and see if any of them are blown. The rear defroster has a blend door that opens and closes that is electronically. If the fuse is blown, either the switch has failed or the blend door motor has failed. If you need further assistance with your vehicle, then seek out a professional, such as one from Your Mechanic, to help you with your defroster vents not blowing air.
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Problem with AC/heater – 2005 Ford Explorer
ANSWER : Hello. The problems you describe with the front system may either be a faulty control switch or faulty vacuum motors for the air blend doors. The problem in the rear is likely the rear heater control valve, which regulates the flow of hot coolant to the rear heater core and air duct system. The clicking noise may be a broken vacuum motor for that valve (integrated in the valve).
I would recommend having a certified mechanic, such as one from YourMechanic, come to your location to perform an inspection of the heater and suggest the needed repairs.
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Overheats When Blowing Warm With Heat & AC But Not When Blowing Cold AC
ANSWER : Hello, thank you for writing in. There are so many different codes being triggered, that it is unlikely all of these systems are having issues at once. We need to focus in on the fact the engine is overheating at all. You will want to check the level and condition of the coolant and the overflow tank. If the level is full then you may have an issue with the thermostat, radiator cap, or water pump. These can all be tested and changed relatively easily. If the main cooling system is okay, you will want to look into the heater core and climate control module. For more diagnostic help, contact our service department to schedule an appointment.
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AC Blowing from vents and defrost
ANSWER : The air conditioner blend door is controlled by an electronic actuator and if the door is not in set position then you may have a defective actuator and need to replace it. The door operation should be in the manual mode to make sure the actuator is defective or there is a blend door stuck from something getting down in vent door. Sometimes a pen, paper clip, or pencil can fall in the defroster vent and can lodge in the door and not let it seal. If this is the case, then the evaporator case may need removed to get out the item out of the case door. I would have a professional scope out your AC system firsthand and determine what fixes will help.
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2008 VW Jetta AC not cold
ANSWER : Hi Allen. By far the best way to have your AC system correctly diagnosed is by having an AC inspection completed first. By having one of our professional mobile mechanics come to your location to diagnose the issue correctly, it significantly minimizes the mistakes in completing the wrong service. In your case, the issue could be as simple as needing to have the AC system recharged, or there is an existing leak that needs to be repaired before refilling the refrigerant. Best economic bet is to have the AC inspection completed first.
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A/C blowing out of defrost and vents
ANSWER : The mode door has an actuator that may not be moving the mode door when you are changing position where you want the air to blow. You will need to have the mode door actuator wiring checked and verified it can control the door and replace the actuator. When the actuator is remove then the mode door can be moved to verify it is able to change air flow position and then replace the actuator.
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I have a 1999 chevy Tahoe that only blow air from the defrost vents. How can I get the air to blow in your face of feet?
ANSWER : The control actuator that moves the door to control this may have a wiring connector issue due to connections at control head and actuator wiring was miss routed and it pulls the harness connector wires too taught. You should disconnect and reroute the harness to not be too taught and do a drag test and pin connector test to make sure harness connectors are good. You may need to repair one or more connector female pins. If after repairs the actuator may need to be replaced.
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