Heat and AC problems
Thread Starter
|
New User
Joined: Apr 2007
Posts: 6
Likes: 0
Heat and AC problems
I just got my truck and Im havin some Heat/Ac problems
The only vents that blow hot/cold air are my defrosters, when i change selections nothing happens
Is this an easy problem to fix
The only vents that blow hot/cold air are my defrosters, when i change selections nothing happens
Is this an easy problem to fix
New User
Joined: Mar 2006
Posts: 2
Likes: 0
The switch is contrlled by vacuum. Check all the vacuum hoses, cannister and pump to make sure everything is as it should be. The cannister and pump should be on the passinger side of the engine compartment towards the front. There is also vacuum lines that go to the 4 wheel drive system on some. Mine is an early 99 and has the vacuum switched 4x4. I had to plug the 4x4 line and now every thing works fine. When there is a vacuum leak the vent defaults on defrost. Hope this helps.
Senior User
Joined: Oct 2004
Posts: 376
Likes: 0
From: South Dakota
Sounds like a vacuum leak. Plug the red vac line to the solenoid and if you get air from other positions then your solenoid not working and vaccuum pump is working because you are getting air from other positions. An easy way to check your vacuum pump, is turn the key on see if you hear the pump running. However if the reservoir is charged then take the vaccuum line from the pump going to the reservoir and disconnect it. The vaccuum pump should start running, put you finger over the end and it should quit. The vaccuum hub lock lock solenoid p/n 6C3Z9H465 BA cost me $51 dollars.
