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1994 Dodge Dakota Question: 94 65,000 miles. Heater takes along time to heat, and the fan kicks very quickly

 

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corn1, Rockford, IL, August 10, 2013, 11:13
 Rookie

even in cold weather changed thermostat (didn't help). fan kicks on within 20 to 30 seconds after start-up... any ideas?

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  • Answer #1

    Real Auto Haus (111 Answers) , Westmont, IL - (630) 361-6756
    TristanReal August 10, 2013, 11:20
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     Journeyman

    Check temp sensor, can be signaling fans to turn on early not letting engine warm up properly. Check temperature of upper and lower radiator hose with a temp gun. If there is a big difference even after fully warmed up check thermostat and water pump also for blockage in the system. check coolant condition as well.

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    corn1, August 12, 2013, 12:20
     Rookie

    Engine is 3.9 manual... and fan still comes on with all controls in off position

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  • Answer #2

    August 10, 2013, 13:11
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     Master

    Turn all heat/AC controls off to see if that fan comes on then. The actual engine cooling fan should be a mechanical clutch controlled fan! I think all 3 engine options use this system, you did not post eng. info.

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    PARTS GUY, August 11, 2013, 04:01
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     Master

    You are correct. Would like to know what he means by "fan kicks very quickly".

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    pushrod, August 12, 2013, 00:41
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     Master

    Got to be the electric radiator fan that comes on when the A/C compressor needs it to. If the HVAC system were turned OFF, this fan will not come on!
    But i guess someone will show corn man what i mean, i hope. Most likely heater core problem anyway, cool in IL. i guess.

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