Some customers may comment that the engine is overheating. This condition mainly occurs on 4WD 2500 series models that are equipped with a snowplow.
A lower fan clutch disengage speed, resulting in insufficient airflow passing through the radiator to trigger fan clutch engagement, may cause this condition. The snowplow may also contribute to interrupted grille airflow, which results in the fan clutch not sensing the warm air coming off the radiator and consequently not engaging the clutch.
Replace the fan blade clutch assembly with a new fan clutch that has a higher disengage speed.