Defrost Only regardless of Setting


Have you had your HVAC controls stop working except for the defrost regardless of where the mixer dial was positioned?  I did recently.


The fix is simple - you just need to know where to look.

Pop the hood and look at the intake manifold (on the driver side).  You will soon discover that a hose has fallen off the intake manifold.  I've circled where the problem is - the hose is hanging to the right of the nipple.

Locate this hose connection

Slide the hose back on - you'll see how easy it slides on and will now know why it came off (too loose...).  I plan to add a zip tie to mine shortly:

Slip the hose back on

All done - took longer to read this than it will to fix it.

All done

EDIT:  If this doesn't fix your problem, then there are other issues at work.  You might have something related to TSB # 242499 (HVAC changes to defrost under acceleration) or something else.

Help the Cause

Did this site help you?   Did it save you some money?   Show your gratitude by helping to keep it online!

Use the donate button below to make a contribution via Paypal.

Thank you to those who have made donations - your generosity is greatly appreciated.

Jeep®, Jeep® Grand Cherokee, Jeep® Cherokee, Jeep® Wrangler, Jeep® Liberty, Jeep® Commander, Jeep® Commanche, the Jeep grille, Quadra-Drive, Quadra-Trac II, Selec-Trac, Vari-Lok, Trac-Lok, Quadra-Coil, Sentry Key, and Mopar are trademarks of DaimlerChrysler.