Seat AC works but heat doesn't ?

Discussion in '3rd Gen - 2007 - 2017' started by monkstr6100, Mar 12, 2018.

  1. monkstr6100

    monkstr6100 Member

    Age:
    34
    Posts:
    5
    Likes Received:
    0
    Joined:
    Mar 12, 2018
    Location:
    WI
    on my 2011 expedition limited max, the driver side seat heater doesn't work. When I press the button the light comes on and the blown cones on as well. But after about 10 seconds it shuts off. At that point neither the heated or the cooled seat functions will work? The cooled one does work when it's pushed first. Passenger side all works fine. Is my element bad? Can I pull a fuse and reset something? Thanks in advance. This is a new to me vehicle.
     
  2. deweysmith

    deweysmith Full Access Members

    Age:
    33
    Posts:
    572
    Likes Received:
    197
    Joined:
    Nov 8, 2017
    Location:
    Montreal, QC
    There is a 40A fuse under the hood in the Battery Junction Box for the DCSM (Dual Climate-controlled Seat Module). The module is always on, so they never get to reboot. If there's a problem, often times pulling this fuse for a couple of minutes and replacing it can fix it.
     
    barrydu4 likes this.
  3. hk_bird

    hk_bird New Member

    Age:
    25
    Posts:
    1
    Likes Received:
    0
    Joined:
    Mar 8, 2018
    Location:
    Greenville, SC
    I'm having similar issues and I've seen this tip a few times but whenever you take the fuse out, should the car be on or off? I imagine that if you take it out while it's off then turn it on it would work but I'd like to be sure
     
  4. deweysmith

    deweysmith Full Access Members

    Age:
    33
    Posts:
    572
    Likes Received:
    197
    Joined:
    Nov 8, 2017
    Location:
    Montreal, QC
    Doesn't matter. On or off, it will still cut power to the DCSM which is the goal.
     
  5. monkstr6100

    monkstr6100 Member

    Age:
    34
    Posts:
    5
    Likes Received:
    0
    Joined:
    Mar 12, 2018
    Location:
    WI
    Thanks for the reply. I pulled the fuse, and the next time I tried it it seemed to work but cut out after about 30 seconds. Any other ideas?
     
  6. chuck s

    chuck s Full Access Members

    Posts:
    716
    Likes Received:
    168
    Joined:
    Dec 20, 2006
    Location:
    Chesterfield, VA (that's south of Richmond, y'all)
    (Grasping at straws.) Cleaned the filters for the seats? I suspect the drivers seat gets the most use.

    -- Chuck
     
  7. deweysmith

    deweysmith Full Access Members

    Age:
    33
    Posts:
    572
    Likes Received:
    197
    Joined:
    Nov 8, 2017
    Location:
    Montreal, QC
    If you have FORScan you can pull codes from the DCSM and it will tell you what's failing. Usually it ends up being the heat/cool module and it needs to be replaced. If it's one seat only sometimes it's a frayed wire.
     
  8. monkstr6100

    monkstr6100 Member

    Age:
    34
    Posts:
    5
    Likes Received:
    0
    Joined:
    Mar 12, 2018
    Location:
    WI
    Just ordered the ohp brand elm327 plug so I will try that. Also ordered a new motor for my driver side power running board. Gears are stripped. Thanks for all the help guys. Will update when I hopefully get it fixed.
     
  9. monkstr6100

    monkstr6100 Member

    Age:
    34
    Posts:
    5
    Likes Received:
    0
    Joined:
    Mar 12, 2018
    Location:
    WI
    Also I may try unplugging either the seat cushion or the seat back element, one at a time, and then seeing if it still trips itself out. At least I can isolate were the issue is then.
     
  10. rollinstone

    rollinstone Full Access Members

    Posts:
    92
    Likes Received:
    17
    Joined:
    Mar 26, 2014
    Location:
    Seattle
    Slightly OT, but would this 40a DCSM fuse also control the heating element in the rear passenger seats? Left seat switch light flashes then goes out instantly... no heat to that side. 2014 LTD.
     

Share This Page