blower troubles

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Dec 4, 2014 | 07:08 AM

ttesrod4

Thread Starter

Newbie

Joined: Dec 2014

Posts: 1

Likes: 0

Model: Cherokee

blower troubles

I have a 98 grand cherokee , for some reason when i bought it the blower only works on defrost. Any clues what i can do to fix this problem?

Dec 4, 2014 | 05:23 PM

dave1123

Old fart with a wrench

Joined: Nov 2010

Posts: 14,398

Likes: 741

From: Manlius, east of Syracuse, NY

Year: 2000 XJ Sport & WJ Laredo

Model: Grand Cherokee (WJ)

Engine: 4.0L

Welcome to CF!

Sounds to me like a broken blend door shaft. Not uncommon on any jeep. Do a search on the forum and you should find what you need to fix it.

Replacing the blend door the dealer's way requires removing the entire dashboard. There are kits where you cut a hole in the heater box to get to it and replace the piece with glue and sealer.

Dec 5, 2014 | 08:25 AM

caged

CF Veteran

Joined: Nov 2008

Posts: 7,874

Likes: 100

From: Northern Ontario, Canada

Year: 1990, 1999, 2000

Model: Cherokee

Engine: 4.0

not the blend door, that's for hot/cold.
it sounds more like the selector.

it could also just be a vacuum problem that controls the selector.
i'm having the same problem in my 97 tj. gotta pull the dash to get the hvac out and see what it actually is. i can't see a vacuum leak on mine.

Jan 29, 2015 | 04:42 AM

radicalvette

Junior Member

Joined: Jan 2015

Posts: 65

Likes: 1

From: Georgia

Year: 2001

Model: Grand Cherokee

Engine: 4.0 litre

Vacuum.... either the vacuum hose is loose or off at the intake or the vacuum canister has failed either way look for where the vacuum line runs through the firewall usually on the passenger side and start back tracking.