Question about 2005 Ford F-150

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Heater fan only works on high speed 4.

2005 Ford F150 s/c 5.4 dealer diagnosed heat fan blower motor resistor is defective, I've ordered one, now I need to know where it is located under the dash passenger side, or is it under the hood somewhere? Please guide me to its location.

Thanks

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  • Anonymous Dec 21, 2008

    i have the same problem only the two owest setting work.

  • thomasscholz Feb 07, 2009

    i have 2006 f-350 diesel and the blower only works on high, i cant locate the blower resistor?

  • bluegill2lb Feb 10, 2009

    Only 3&4 speed work on the fan switch, need a fix or how to take apart to remove switch.

  • Anonymous Apr 28, 2009

    The fan switch only works on high in my 2005 F150 5.4 liter. Is it a simple fix?

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Sounds like the switch is bad. Test the power coming in to the connector and use jumpers to get the fan to operate at all 4 speeds. if it works then it the switch.

Posted on Nov 22, 2008

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=======

For blower motor testing and replacing, check the link below: ----

Blower motor Testing/replacing for all vehicles?

http://repairhelpcenter.blogspot.in/2012/02/blower-motor-replacing-for-all-vehicles.html

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Please rate as solved problem if this is what you needed.

------------------------------------------------------------------------------
Manual Climate Control System Outputs
Blower Motor Switch Resistor
Blower Motor Resistor Coils 9ba1105.gif Blower Motor Thermal Limiter 47afe58.gif The heater blower motor switch resistor has the following features:
  • The assembly is located on the passenger side of the plenum assembly behind the glove compartment (06010).
  • Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.

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