98 Grand Cherokee Heater Stuck in onl...

98 Grand Cherokee Heater Stuck in only one mode


Herndon, VA

#1 Aug 12, 2008
Hey guys, thanks in advance for your help. But i have a 98 Grand Cherokee with the knob style heating controls. Changing the mode (floor, defrost, front, front+floor) is unresponsive and only blows air at the windshield. Any ideas what it could be and the possible remedy?

Buffalo, NY

#2 Sep 4, 2008
Check your vaccuum lines, my buddy had the same problem on his 02 and all the problem was a vaccuum line that came loose.

Kennewick, WA

#3 Sep 5, 2008
or the switch itself went bad.

Springfield, MO

#4 Dec 5, 2008
hey heater control stuck on defrost.what should i start with first?

Calgary, Canada

#5 Mar 21, 2009
Have checked all the vacumn lines for this problem. Has anyone seen anything specific?

Albuquerque, NM

#6 Mar 31, 2010
My heater is stuck on heat and wont change over to cool at all, any suggestions?

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