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Thread: Cooling fans not kicking on while car is idle.

  1. #1
    Member
    Join Date:  Jun 2015

    Location:  Virginia

    Posts:    60

    My VIN:    6989

    Cooling fans not kicking on while car is idle.

    I keep an eye on my engine temperature gauge quite a bit (force of habit now due to scary close calls in the past). Lately, I noticed that if my car is stopped(engine running), the gauge would be exactly between 220 and the first orange dial, then the fans kick on.

    Last night, as I was sitting in the drive thru, and I noticed the gauge crawling very close to the first orange dial. Of course, I turned on the A/C before the orange dial was reached, and the car cooled down fine. I have no issues actually driving, the engine stays cool as it should while the car is in motion.

    I apologize if this has been answered before. What is it most likely? Thanks in advance!

    -Fluxn83

  2. #2
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    8,382

    My VIN:    03572

    You should make up a jumper to jump the two otterstat wires to verify connections are working. When jumped and key turned on jumping should turn of the fans.

    If your jumper test works, most likely your otterstat needs replacement. Otterstat can also not work if you have some air in the cooling system.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  3. #3
    Senior Member DavidProehl's Avatar
    Join Date:  May 2011

    Location:  Maple Grove, MN (Minneapolis) & Singapore

    Posts:    1,380

    My VIN:    05457

    Quote Originally Posted by Bitsyncmaster View Post
    You should make up a jumper to jump the two otterstat wires to verify connections are working. When jumped and key turned on jumping should turn of the fans.

    If your jumper test works, most likely your otterstat needs replacement. Otterstat can also not work if you have some air in the cooling system.
    +1

    I see you are fairly new to the forum, not sure how new you are to DeLoreans, so please forgive me if this is too basic. The otterstat is located on the driver's side, sticking out of a coolant pipe. Just left of center in this picture with the orangish seal:

    David Proehl

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