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Low coolant warning

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Capital G, Mar 23, 2017.

  1. Mar 23, 2017 #1
    Capital G

    Capital G Bobtail Member

    13
    18
    Jan 17, 2017
    TX
    0
    This has been going on for a week.

    We changed the fan clutch when the truck overheated last week.

    Coolant is above the min line. I drained some coolant and it was not hot (just came back from 11 hr run).

    Changed the sensor, and it is still binging. Any ideas what this can be?
     
    Capital G, Mar 23, 2017
    Capital G, Mar 23, 2017
    #1
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  3. Mar 23, 2017 #2
    BigRod2015

    BigRod2015 Bobtail Member

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    Feb 28, 2015
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    Have you checked thermostat? Mine is stuck open and truck is running about 140. The jug and lines just barely feel warm. As far the sensor, I have no clue.
     
    BigRod2015, Mar 23, 2017
    BigRod2015, Mar 23, 2017
    #2
  4. Mar 24, 2017 #3
    pushbroom

    pushbroom Road Train Member

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    What truck... what engine... not hot coolant? And gauge never reads high?
     
    pushbroom, Mar 24, 2017
    pushbroom, Mar 24, 2017
    #3
  5. Mar 24, 2017 #4
    xsetra

    xsetra Road Train Member

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    Bad wire. Grounding/shorting out.
     
    xsetra, Mar 24, 2017
    xsetra, Mar 24, 2017
    #4
  6. Mar 24, 2017 #6
    Capital G

    Capital G Bobtail Member

    13
    18
    Jan 17, 2017
    TX
    0
    Just checked coolant, running overnight.

    Coolant is at normal level. It is in fact hot as should be.

    2012 Pete 389
    Cummins ISX485

    Still binging like crazy. Will recheck all wires again in the day
     
    Capital G, Mar 24, 2017
    Capital G, Mar 24, 2017
    #6
  7. Mar 24, 2017 #6
    pushbroom

    pushbroom Road Train Member

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    0
    In the tank there is a magnet that floats up and down to signal the coolant level. Pull the sensor out from the bottom of the tank and put a magnet to the top of the sensor. If the dinging stops, you need a new tank as the float is stuck
     
    pushbroom, Mar 24, 2017
    pushbroom, Mar 24, 2017
    #6
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