Question about 1997 Jeep Grand Cherokee

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1997 jeep grand cherokee--no defrost

When i move the heat control to the defrost position it stays on the floor.can't get it to blow on the window in any position.thanks

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YOU NEED TO CHECK FOR A VACUMM LINE THAT HAS FALLEN OFF A CONNECTION, OR YOUR VACUMM MOTOR THAT CONTROLS THE BLEND DOOR HAS GONE BAD AND NEEDS TO BE REPLACED

Posted on Jan 24, 2009

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Air only blows from the dash vents and will not change to the defrost or floor, and I have no heat - only cold air. Air conditioning seems to work. 1994 jeep grand cherokee v8 with climate control.


the damper or flapper ibside the heater box is not moving. If they are vaccum actuated could be lack of vaccum or bad diafram in the actuator...replace

Sep 09, 2010 | 1994 Jeep Grand Cherokee

1 Answer

I have a 2003 Jeep Grand Cherokee Overland with automatic climate control. The drivers side blows cold air constantly. It has no heat.


sounds like the blend door motro may be bad, this motor is screwed to heater box, there are a few of these motors one for pass/side for hot/cold air then one to control position of air like defrost or vent or floor, then the driverside cold/hot air, i think this motor is on driverside part of heater box, to make sure locate each motor while moving all controls until you spot the one that doesnt move, then remove it and move door manualy to see if you get heat, then replace that motor, hope this helps,

Dec 26, 2009 | 2003 Jeep Grand Cherokee

1 Answer

The heat in my 2004 jeep grand cherokee only blows threw the defroster. when switched to vents or floor it still only comes out the defrost. any suggestions


bad switch the cheapest solution or the blend door is not responding to the switch you can locate the blend door under the dash

Dec 07, 2009 | 2004 Jeep Grand Cherokee

3 Answers

1997jeep


passenger side lower firewall ,look for rubber hose with a split across the end of it ,squeeze it to get the muck out of it

May 30, 2009 | 1997 Jeep Grand Cherokee

1 Answer

2001 Jeep Cherokee a/c blows defroster only, no cruise control


There is a vacuum leak under the hood somewhere. Check the vacuum at the speed control servo. If there is no vacuum on the line with the engine running, follow the line to find the leak. The vacuum reservoir is mounted under the battery tray. I would look in that area after confirming no vacuum at the servo.

Apr 27, 2009 | 1995 Jeep Grand Cherokee

2 Answers

'04 Jeep Grand Cherokee: Heats...but only through defrost vents.


Check the control cable that operates the diverter door in the heater box at both ends, to make sure that it operates the door when you move the control lever.

Jan 15, 2009 | 2000 Jeep Grand Cherokee

1 Answer

No heat


Its a vaccumm line (and possibly routing switch (the rotary one)) problem.

Dec 21, 2008 | 1999 Jeep Grand Cherokee

1 Answer

Heater vent doesn't shift to all positions


Sounds like you have a vacuum leak, those controls are are accuated by vacuum.

Dec 02, 2008 | 1995 Jeep Grand Cherokee

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