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Low coolant, bad coils, perforated radiator hoses, blockage of the vents.. it's a bit difficult to pinpoint without knowing the conditions and circumstances under which it happens. For instance, if you're an OTR/Regional driver with something like Detroit Diesel's Optimum Idle system, and it fails to kick on when the motor cranks over, it may be the result of electronics failure.

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15y ago

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