Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Floyd on November 03, 2010, 07:35:24 PM

Title: Heater problem
Post by: Floyd on November 03, 2010, 07:35:24 PM: Hi,

This is my first post so please be gentle with me!

My heater is fine for hot and cold air but only directs to the windscreen. I wondered if this is a common fault on the Cherokee and if so is there an easy fix?

Thanks in advance.
Title: Re: Heater problem
Post by: Carlos Fandango on November 04, 2010, 07:32:32 PM: Do you have a Mark one cherokee or a Facelift version?
Title: Re: Heater problem
Post by: Phatcol on November 05, 2010, 02:07:26 AM: Hi all, firstly, my apologies for "pinching" the thread, but I've got the same problem! Mine's the facelift model ('98 2.5 TD). Any help would be appreciated, as I can only get the fan to work on demist. The temp controls fine also.
Thanks for any ideas! Col.
Title: Re: Heater problem
Post by: tim_aka_tim on November 05, 2010, 02:53:13 PM: Quote from: Carlos Fandango on November 04, 2010, 07:32:32 PM
Do you have a Mark one cherokee or a Facelift version?
Profile says a 99 facelift.
Title: Re: Heater problem
Post by: Bubba on November 05, 2010, 09:49:36 PM: its common then the floater does the same
Title: Re: Heater problem
Post by: Carlos Fandango on November 05, 2010, 10:02:09 PM: I dont know if its common or if I am even in the right area, but just a stab in the dark, on the facelift models the air direction controls work off the vacuum system so I would suspect a leak somewhere, I would have thought one of our resident experts would have been along already to advise from their deep experience.

Does cruise control work if you have it?
Title: Re: Heater problem
Post by: Bubba on November 05, 2010, 10:06:05 PM: i was thinking vacume problem
Title: Re: Heater problem
Post by: j33pky on November 05, 2010, 10:14:38 PM: Quote from: Carlos Fandango on November 05, 2010, 10:02:09 PM
I dont know if its common or if I am even in the right area, but just a stab in the dark, on the facelift models the air direction controls work off the vacuum system so I would suspect a leak somewhere, I would have thought one of our resident experts would have been along already to advise from their deep experience.

Does cruise control work if you have it?

mk1 are the same as face lift. take dash apart and remove heater control panel and you will find a plug with a black pipes in check there first. even though mine had com apart at a joint that was right a the bottom of the dash by the center console.
Title: Re: Heater problem
Post by: Mike Pavelin on November 05, 2010, 10:16:50 PM: Check the vacuum tank behind the front bumper isn't missing/broken/disconnected first.
Title: Re: Heater problem
Post by: Dave69 on November 05, 2010, 10:20:00 PM: the air direction is controlled by the vacuum system.

94yr schematic

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi39.photobucket.com%2Falbums%2Fe198%2FDaveP69%2F94heatercontrol.jpg&hash=23a0907df45915d6ac84068bab13afebcce0e38e)
Title: Re: Heater problem
Post by: Floyd on November 06, 2010, 06:10:20 AM: Thanks guys.

I'll check out your suggestions and report back.

Thanks again!
Title: Re: Heater problem
Post by: LAMBLE on April 10, 2011, 12:42:28 PM: Sorry to raise an old thread but I need the correct confuguration for the vacuum pipes at the connector behind the glove box. Im not sure where the black pipe from the engine bay connects into. All the other pipes are colour coded and it looks like on the schematic that there is a t piece to join them together? Tried to do it from the diagram but pictures are alot less :017:

I have attached photos of mine at the moment