The switch to the vents to circulate the air either inside or outside is broken. When changing the switch from outside air to inside I felt some resistance at first and then it seemed to give in. Now there is no resistance what so ever. How can I go about fixing this or do I need to take it in to a machanic?
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Re: Air vent problems.
Look under the dash to the side of the heater box where the air door controls are. See if the cables are all attached. If so, remove the heater control and look at the backside of the recirc lever. The cable may be off there. If not, sometimes, the cable housing pops off of its retention clip, and just has to be reseated.
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Your air circulation knob or switch has 2 settings ,recirculate and fresh air,turn to fresh air,put on cold and turn the fan on to your speed you want and air will circulate from the outside to the vents,put it on mid level.
There is a vent door that switches the intake air from outside air to inside air. (fresh vs recirculating). The vent door in some dodges break and fall down over the vent air intake, just above the fan. You can take the three fan motor screws out and reach up inside. You should be able to feel the broken vent door laying, covering the intake hole. You can try to tape it up, screw it up, or some other way of fastening it in place. I tried tape, but here in az, the heat got to it and it fell back over the intake hole. I removed it entirely. Now I cannot select fresh or recirc, but it blows hard again. The alternative is paying the dealer 700-900 to repair it. Good luck.
is the compressor working and pressurizing the freon --- is there air in the system along with the freon preventing the system from circulating --- is the heater control or vent closing --- are the evaporator coils/fins clogged or dirty -- are the air conditioning selector controls properly actuating vents for mixing inside and outside air and closing off heatter vents --- need more investigation on your part
Inside the ventilation system there is gates that open and close to direct the air flow. These are operated on vacuum on most vehicles. The hose for that perticular gate may have disconnected somehow or has a hole in it. I suggest you take the heater controls out and see if there is a plug with a series of colored hoses on it. it so you'll have to trace each of them to see which one is the problem. Now you may be able to get some help from you local dealers mechanic who just may know the color code for that gate. (which would be a bonus) Good Luck
Does your blower have a vibration at higher speeds? Have the same problem in my truck. After digging into it I found that the Re-circulation door axle pivot is broken. This door shuts off the outside air intake for re-circulating air. It also closes off the interior air intake when re-circ isn't used. If the door is broken it will sit in a half open position allowing all the forced air to escape through the outside air intake. I hear this is a common thing to happen. The servo motor that cycles the door is a little too powerful and it snaps the axle pivot.