I have a 1999 Ram and the a/c blows through the vents located right under the windshield only. It used to blow through the front vents but whenever I stepped on the gas, it would blow through the windshield vents. Now it completely stopped blowing through the front vents. Even when I set it to blow on my legs, it only blows through the windshield vent.
Anyone know what's wrong and how much it'll cost to fix?
2006-10-04 11:48:42 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Federal law requires that ALL heaters and A/C units must default to DEFOG if there is any control function failure. It sounds like you have lost vacuum control somewhere, either under the hood, or perhaps a vacuum connection under the dashboard.
Start the truck and LISTEN very close for a pronounced "hiss". Under the dash is somewhat difficult, so cut a piece of vacuum hose about 4' long and place one end in your ear, and use the other end for a "sound sniffer" to help locate it. If you can't find it, chances are that the control head is defective.
Good Luck
2006-10-04 11:54:02 · answer #1 · answered by Ironhand 6 · 1⤊ 0⤋
I got a 2000 and it does the same thing. The vacuum line going to the climate controls has come loose or is broken. It is a black plastic line going through the firewall. Usually on the passenger side next to where the A/C lines go through. Or it could be loose inside. Crank it up and see if you can hear a hissing noise. When you find the leak then fix it and your problem should be gone. As far as the stepping on the gas and it doing it; stupid dodge should have used a vacuum can for those times when (during accel.) vacuum would be low to prevent that from happening.
2006-10-04 18:55:27 · answer #2 · answered by Air C 2 · 0⤊ 0⤋
There is a small pancake style check valve in the vaccum line under the hood going inside to the controls Dodge makes a larger replacement check valve a cannister type to correct this problem
2006-10-05 09:06:57 · answer #3 · answered by moremoparparts 1 · 0⤊ 0⤋
The thing to check for first is a vacuum leak from the engine to the vent selector switch. When it goes to defrost only this is usually the problem.
2006-10-04 18:52:47 · answer #4 · answered by Lab 7 · 0⤊ 0⤋
The switch that controlls this vaccumn opperated. It has a vaccumn leak. Check the houses coming in from engine compartment into and through the fire wall. There is a crack or broken hose.
2006-10-04 18:55:50 · answer #5 · answered by goldwing127959 6 · 0⤊ 0⤋