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I have a 1972 coleman electric furnace with an element out the tech's i have had out (2) advised me that they could not get the parts needed to fix this, could someone help me please. I can not afford a new furnace.
YOU COULD REMOVE THE ELEMENTS KILLING POWER FIRST AND TAKE THEM TO THE HEATING AND COOLING SUPPLIER NEAR YOU SEE IF THEY CAN CROSS IT WITH ONE THAT WILL BOLT UP OF EQUAL WATTAGE , AS FAR AS THE 72 COLEMAN THE TECH IS MOST LIKELY CORRECT .
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Sounds like the heating element has broken in two and is shorted to ground. even with only 110 to one side of the element and if the element burns in two and fall against the side of the frame it will complete the circuit and begin to heat up. Make sure you shut the power off to the furnace and then pull the heating element assembly and examine the elements to see if any are broken and shorted to the frame.
Yes your sequencer is the switch to energize the elements & sometime the low speed on the blower motor. It completes the 240 volts going to the elements. The sequencer turns the elements on in stages as well as the blower, & most sequencers have numbers on the side to tell what thermal disk turns on first. The blower, & one element should be wired on the 1 & 2 terminals (this turns on first when the sequencer coil is energized & shuts off last when the coil is de-energized). If any of the thermal discs are stuck closed, this will constantly energize the element on that switch.
That is probably normal if it is electric heat to slow the air over the heating elements. Even some gas units do this. Check to see if the unit blower motor has wires for multiple speeds.
The AC unit outdoors must be running and rejecting heat by its air flowing through it the 2 copper lines are the refrigerant lines, the fatter one should be "beer can cold" if not its low on refrigerant or not running.
That sounds pretty normal for most furnace/heater products. They run the heating element with fan for a cycle then after the heater reaches temperature it will shut off and the fan will continue to run to cool the element and to circulate the heat that it produced. If you want the manual for this product it looks like you can get it here: http://homeappliance.manualsonline.com/ex/product/headline/m/Coleman%2BEvcon/d/furnace/p/DGATO75BDC
Either the blower or its control has gone bad. You will need to call a service company to have them troubleshoot it for you. Did your A/C drain work OK this summer, or did it spill water?
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