Resistor value

Discussion in 'Tech/Mech General' started by gus-lopez, Jul 6, 2016.

  1. gus-lopez

    gus-lopez Funster

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    Has anyone any idea of the value of the resistor needed for a 1990 ducato heater motor ?
    Only details I can get off of it is
    Fiat/Lancia 8743OC 9370101 TY 937 then it has 90 followed by what appears to be a degree sign (º) followed by a squiggle ? then a 10 with possibly a degree sign .
    Any help appreciated.
     
  2. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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  3. gus-lopez

    gus-lopez Funster

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    The 3 'springs ' on mine are perfect but the pot is u/s. I've looked at most of the newer ones & the plug socket appears slightly different. The first one on your link is 2nd hand & looks exactly like mine. & mine doesn't work .:)
     
  4. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    Yes the first one looks rough to be fair but while the connector orientation on the second is different the shape of the socket looks the same. Not sure what you're referring to as "the pot", a pot is generally a potentiometer or variable resistor and there isn't one in this setup. If you refer to the small cylindrical item under the coils I think you'll find that is a thermal fuse which is the most common point of failure on these items. The resistor pack generally sits in the outlet ducting from the fan and the airflow keeps it cool, when they get old the air flow can be reduced due to worn motors and/or dirt and debris in the air intake. This allows the resistor pack to overheat and the thermal fuse burns out, usually resulting in no lower speeds but the fan will run at full speed because that doesn't run via the resistors.

    D
     
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  5. gus-lopez

    gus-lopez Funster

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    Problem solved. I removed the thermal trip, put in freezer overnight & it has reset . Soldered back on & works a treat again. (y)
     
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