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Vulcan wall furnace about 12 years old manfacturers #2284 fan became intermittent before completely shutting down. pilot works fine just the fan stopped working

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  • martindarman Jun 27, 2009

    i checked the blower resistor and its reading fine approx .7kohms(boost speed) upto 1.8kohms(slow speed) any other suggestions?

  • martindarman Jul 01, 2009

    sorry seth for late reply ive been crook. Got no heater so i caught a cold. The irony of it all : )

    ok i have 4 wires going to the motor.
    2 for the windings which reads .5 ohms.
    1 for the switching from thermostat
    1 for ground

    thermostat is fine. when heated it goes to short.

    i was thinking the capacitor as it looks like this circuit requires a kind of exciter to kick the motor into moving. so i hooked it all up and gave it a finger push (the same purpose of the capacitor)......... nothing

    i'm gonna kick the thing in the guts and buy another



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Ever oil the motor?
ever clean the dust out?
good luck!

Posted on Jul 01, 2009

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Hey there, have you tried to ohm out the motor itself? It's possible the internal overloads in the fan motor were opening and closing due to winding break down or bearing drag and finally failed or the windings themselves opened. No continuity across the windings when the motor is cool means a bad motor. Another thing to look at is the relay that turns the fan on. Check the continuity accross the contacts when they close. They can tend to build up dirt and carbon on them. Let me know what you find out. If all looks ok see if you can get an amp draw reading on the motor to see if it is trying to start.
seth

Posted on Jun 27, 2009

  • seth veloso Jun 27, 2009

    Hey, I got no response from ya I hope all is good to go for ya
    seth


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Well try to check the blower fan resistor on your unit... it is possible that this part is now faulty and not working...

Posted on Jun 25, 2009

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