Question about 2001 Jeep Wrangler
I believe it is a low vacuum promble, it only happens on the highway when it is working hard, around 2000 rpm, you can hear it switching on you, when you let the peddle off it will go back to the floor heat, but when driving normal it will always go back to the window defrost, why?
I'm not sure if this applies to your vehicle but often a vaccuum reserve tank is used in the system to eliminate this problem. If you have one, make sure it's not leaking. If you don't and were supposed to, someone may have removed it. There also may be a check valve in the line somewhere that is malfunctioning. This used to happen on older vehicles with vaccuum wipers. They would almost stop when going uphill. It's the same thing, just on a different system! Could also be a slight bleed-off from a plenum door motor that is not bad enough to not work, but just enough to react to low vaccuum caused naturally when engine is working hard.
Posted on Mar 11, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 08, 2011 | 1997 Jeep Tj
Sep 13, 2010 | 1997 Jeep Grand Cherokee
Oct 08, 2009 | Jeep TJ Cars & Trucks
Sep 19, 2009 | 1999 Jeep Wrangler
Jul 29, 2009 | 2002 Jeep Liberty
Jul 06, 2009 | 1997 Jeep Tj
Jan 05, 2009 | 2004 Jeep Grand Cherokee
Nov 22, 2008 | 1998 Jeep Wrangler
257 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: