1998 Dodge Ram 1500 4WD "vent vacume switch" Questions

t blow as much as it should. Seems like it goes through the defrost/windshield vents more than it should. I'm thinking a stuck vent? Check the vacume pipes under the viper shield behind the engine

...vent blower switches to defrost. I think it is a vacume problem? Hello.Yes,it is a vacume problem.What happens is that the vacume controled a/c control head looses engine vacume because the one-way ...

...vents work just slightly but it wont switch from vent to floor etc. Check for a loose vacum line under the hood over by the fire wall on passenger side if no vacum at that hose add vacum.Good

...vent/floor or defrost My vents won't switch the vents. It only blows a little bit when it is on vent and mostly comes out of the floor vents. Can anyone help check all the vacume lines going under ...

...vacume leak not allowing the vent system to switch from door to face air flow. If your cents are controlled by a cable rather than vacume, it is possible that the clip holding the cable has

the ac only blows out the top(defrost) and floor at the same time. it want blow out the front vents. Whats the problem and how to fix it? The problem is that the control is vacum operated,so either ...

...blows every where else. could be the hose under dash has come loose or the vent switches run off of your engine vacume check under hood on heater blower housing for vacume line that may have fallen ...

...vacume hose that has come off at the vent switch or under the hood. Unfortunatly you will have to pull the vet switch out of the dash to see if there are any vac. lines off. You can visibly inspect ...

...switch that operates the air direction could be bad. I hope this helps, please let me know. to start with check all your vacume hoses that control heater functions, to do this gently remove the front ...

...vent is stuck on defrost mode. when i switch to a/c or face/floor no air is directed out. the fan seems to be working fine The air direction is vacum controlled. If you have 4X4 and ESOF ( switch in ...