Question about 1991 Ford Econoline

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1991 ford econoline heater problem

My van heater blower motro did not work for months.suddenly it came on and went off.I cant get it to come back on.I ran direct current to blower and it works.I replaced relay under the hood ,no luck.I have one hot lead at the connection to the relay and thats it.also one time i just kept switching the heater on and off rapidly and one time I got about 20 seconds of nothing ,,,any ideas.thanks

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  • dannyboy342 Feb 27, 2009

    I was informed by emjem74 that there is a fuse in my heater switch .Is the fuse inside the control unit?



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Ther is a small fuse in the switch itself so i would try to replace this if you get movement when connected to battery directly. if not try to check connections directly behind it to make sure you have voltage with a tester or a wire and a bulb if needs be.

Posted on Feb 26, 2009

  • scott rimmer
    scott rimmer Feb 27, 2009

    the actual switch is the fuse if you dissasemble this unit you would see small capaciters and this is what usually goes, sory for the slow response. i suggest that you try to replace the switch and while there check wires connecting to control switch. the theory goers that if you can manually make the fan work then the break in the loop is the divertor which in this case is a fused switch.


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Run a ground wire from the mounting plate bolt too the ground side of the battery

Posted on Feb 26, 2009


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