99 xj heater won’t change vents but blows out the defrost
Thread Starter
Newbie
Joined: Apr 2018
Posts: 5
Likes: 0
From: Pa
Year: 1990
Model: Cherokee(XJ)
99 xj heater won’t change vents but blows out the defrost
99 xj 6 cylinder bought this as a work car runs great but heater won’t change vents it blows warm air out the defrost but when it’s really windy out I can feel cold air come in the cab by my feet it seems to be
CF Veteran
Joined: Sep 2012
Posts: 1,623
Likes: 13
From: In a large sandbox
Year: 1998
Engine: 4.0
It maybe a vacuum leak. OP, does the temp control switch still function? When you turn it to hot does it blow hot air and when you turn it to cold it blows cold air?
CF Veteran
Joined: Sep 2012
Posts: 1,623
Likes: 13
From: In a large sandbox
Year: 1998
Engine: 4.0
The most common source of vac leak is from "the ball"/canister or the line that runs down the left side inner-fender when you're looking at it under the hood.
I would also consider the blend-door actuator.
I'm leaving for the afternoon but you can find links/diagrams on here and maybe someone else will chime in.
I would also consider the blend-door actuator.
I'm leaving for the afternoon but you can find links/diagrams on here and maybe someone else will chime in.
Thread
Thread Starter
Forum
Replies
Last Post
jeepxj1997
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
Nov 6, 2021 04:55 AM
andresr23
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Jul 15, 2015 05:35 PM
HiGreenMachine
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Apr 18, 2013 05:18 AM
gilmolina
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Jan 29, 2010 08:04 PM
Firestorm500
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
Aug 12, 2009 05:50 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
