Too Cold For The Fan...

Discussion in 'Ask An Owner Operator' started by ProfessionalNoticer, Nov 21, 2021.

  1. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    My fan doesn't kick in automatically to cool the engine. If I have to idle for any amount of time I turn it on manually to avoid overheating. During the Summer that works but now it's Winter I can't do that anymore. If I set the climate controls for Defrost; will that fan cycling for the condenser be enough to keep it from overheating if idling overnight?
     
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  3. bad-luck

    bad-luck Road Train Member

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    If your air conditioner is properly charged it should when the pressure is high enough in the ac system. I would try it while you are idling first.
     
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  4. Ridgeline

    Ridgeline Road Train Member

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    If your engine is overheating while idling, don’t even drive it, there is something seriously wrong.
     
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  5. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Why don't you fix the fan control for engine temperature? Not very complicated
     
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  6. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    The only thing wrong is his fan not working.
     
  7. Oscar the KW

    Oscar the KW Going Tarpless

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    I wonder how many other forums you are on giving out advice about things you have no freakin clue about.
     
  8. Magoo1968

    Magoo1968 Road Train Member

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    First question what are you driving?? A cascadia has a high setting for engine fan paccar as well iirc. 218 or something around that.
     
  9. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    I'm hoping so too. It's properly charged. I just evaced, vacuumed and recharged it myself after putting a new ss heater box in. The fan kicks on/off periodically as it should to keep the condenser cooled. Just never thought about how that would work to keep the engine cool as well since that's not it's job per se.

    I idle at 1k but now it's getting colder it takes quite some time to get the engine hot enough to trip the fan (but it doesn't trip). Fan is supposed to come on at 196 and the warning light is supposed to come on at 212 but something electrical is off because neither of those happen anymore.

    Until I get my laptop, comm adapter and ET I need to make sure I don't roast the engine and idling with the fan on constant is going to cause wetstacking. I think the engine will derate and shut down before it hits meltdown but with the other safety protections not working I'm not so sure of that.
     
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  10. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

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    Ha! He's been on my ignore list since I joined.
     
  11. Don379

    Don379 Heavy Load Member

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    From what you are describing, the only way your truck cools is if the fan clutch is engaged at 100 percent. So when you have to rely on the clutch fan to kick on like that especially if its not hot summer, im gonna say that your water pump is not circulating properly or your radiator is plugged internally in a few spots or maybe even externally in between the fins. So you have a little investigating to do. Check a bunch of different spots on the radiator with a temp gun.
     
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