Heater control switch doesn't work properly.

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Nov 5, 2011 | 05:26 PM

Bryan S

Thread Starter

Newbie

Joined: Nov 2011

Posts: 3

Likes: 0

Year: 1995

Model: Grand Cherokee

Engine: 5.2

Heater control switch doesn't work properly.

1995 Jeep Grad Cherokee limited 5.2 engine.
Heater works fine and so does the fan. Only problem is when trying to change from floor to panel or to defrost it doesn't change it always stays on the floor. I think the switch is working but maybe a vacuum problem. where does the vacuum for this come through the firewall to the engine? Any suggestions is appreciated.

Nov 5, 2011 | 05:33 PM

cherokee45

Junior Member

Joined: Sep 2011

Posts: 39

Likes: 0

From: se idaho

Year: 1999

Model: Cherokee

Engine: 4.0L

Check the line under the battery tray that's where mine was broke

Nov 5, 2011 | 05:54 PM

Bryan S

Thread Starter

Newbie

Joined: Nov 2011

Posts: 3

Likes: 0

Year: 1995

Model: Grand Cherokee

Engine: 5.2

@cherokee45:
I'm assuming this is a vacuum line?

Nov 5, 2011 | 05:56 PM

cherokee45

Junior Member

Joined: Sep 2011

Posts: 39

Likes: 0

From: se idaho

Year: 1999

Model: Cherokee

Engine: 4.0L

Correct

Nov 5, 2011 | 06:47 PM

Bryan S

Thread Starter

Newbie

Joined: Nov 2011

Posts: 3

Likes: 0

Year: 1995

Model: Grand Cherokee

Engine: 5.2

Thanks,
I'll check it tomorrow after church as I have lost daylight for today. Thanks again.

Nov 5, 2011 | 07:10 PM

Silentj

CF Veteran

Joined: Nov 2011

Posts: 1,221

Likes: 3

From: Westminster, MD

Year: 1998

Model: Cherokee

Engine: 4.0

Im having a similar problem with my XJ. I can only get air flow from floor or defrost. It will not blow out the Vents. Seriously irritating. I think i need to search for this vacuum line.