the heated and cooled seats buttons on the AC cluster will not light up or it will light up for 30 seconds and shut off and therefore the seat will not heat or cool. The passenger side works fine. Took it in to be fixed and they replaced the motor and it worked for awhile and then shut off again....any suggestions??

 

Have you checked to see it anything is grounding out?

 

I barely know how to put gas in the truck......I am not really sure what grounding means.....

 

Look to see if anything(wiring) under the seats looks like it is touching bare metal or looks like it should be bolted down and it not.

 

There is a TSB for this I think.

 

TSB 07-21-6

CLIMATE CONTROL SEAT FUNCTION
INOPERATIVE - NO COMMUNICATION - DCSM -
VEHICLES BUILT PRIOR TO 8/31/2007

ISSUE
Some 2007-2008 Expedition and Navigator, 2006 Zephyr and 2007-2008 MKZ vehicles built before 8/31/2007 and equipped with climate control seats may exhibit inoperative heating and/or cooling. There are no diagnostic trouble codes (DTCs) associated with this issue and IDS/PDS will not communicate with the dual climate control seat module (DCSM).

recomend you take it to the dealer

 

best bet is to take it to the dealer

 

I am still having this problem (see below).....dealer has tried to fix it twice and two days after they fixed it the problem comes back.....they are saying the TSB is to reset the heater/cooler part...I guess they are wrong...please help..


the heated and cooled seats buttons on the AC cluster will not light up or it will light up for 30 seconds and shut off and therefore the seat will not heat or cool. The passenger side works fine.

 

Doesn't matter - they don't work very good even when they are turned on.

 

Any word on this, I have the same problem now. I see this was posted a long time ago.

 

07 EL Limited. Both seats had problems at about 25K. Warrenty covered it. Some resistance was wrong in some diode or sensor, don't quote me on that it was four years back.

 

Part of your problem resolved itself in that if the passenger side works fine, you know that the module is okay. That also tells me that the problem is limited to the driver's side. I would suggest suggest getting a nice bright light and a mirror to look under the driver's seat and see if you can see and or hear the blower motor running. There are also 2 heating elements in the seat, one in the seat back and one in the seat cushion. If the blower motor is working, I would be inclined to say that a check of the seat cushion element is next on the agenda. The wires in it are prone to stretching and shorting out. Think about it: Which seat gets the most use/abuse over the life of the vehicle?
Not a comprehensive guide by any means, but it does give you a place to start.