Coolant temp. sensor replacement help?

Discussion in 'Kenworth Forum' started by Patriotleasing, Aug 28, 2021.

  1. Patriotleasing

    Patriotleasing Bobtail Member

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    Anybody in here know if there is a separate sensor for HIGH coolant temp from the regular coolant temp sensor? High temp warning comes on sporadically sometimes at 190°, sometimes at 205°. Hell, it came on the day just idling at a customer at 180°. Already changed the sensor on the front of the thermostat housing but didn't solve it. Maybe changed the wrong sensor? Any help would be appreciated.
     
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  3. Patriotleasing

    Patriotleasing Bobtail Member

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    Sorry, talking about a CAT c15 Acert.
     
  4. 062

    062 Road Train Member

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    Probably have two sensors. One for the gauge another for ecm.
    @spsauerland
     
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  5. spsauerland

    spsauerland Road Train Member

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    Truck model, year, last six of VIN if Paccar.
     
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  6. Patriotleasing

    Patriotleasing Bobtail Member

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  7. spsauerland

    spsauerland Road Train Member

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    P/N for switch for high temperature switch is Q27-6000-225. It is in port 34 in this screenshot.
    Screenshot_20210828-165559.png
    Port 12 is sending unit for gauge. Which did you replace?
     
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  8. Patriotleasing

    Patriotleasing Bobtail Member

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    Yup, replaced the sensor in port 12. P/N 16-10407. Figures. Will order the correct one Monday. Thank you for your time and help!
     
  9. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Don't feel bad. You changed the easier one to access. Make sure you come back and update everyone on how "easy" it was to change the sensor!
     
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  10. Patriotleasing

    Patriotleasing Bobtail Member

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    Really wasn't bad. Mechanic had it done in 15 minutes. Drained about 5 gallons of coolant, grabbed a deep well socket and boom! Done.
     
  11. w9l

    w9l Medium Load Member

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    Had an 05 379 with Acert that I never could keep the temp gauge from running amuck. Replaced both sending units- one for gauge and one for ecm. Replaced gauge with new. Worked ok for a few days then back to showing hot all the time vs checking with temp gun or ecm. Finally bought a Scangauge D to monitor what ecm was reading and problem circumvented. Scangauge D is a pretty handy item.
     
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