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My furnace is the coleman electric furnace model #3400-815 and the fan will not come on by itself. There is a switch that I can turn the fan on but then it runs constantly. What part has gone bad?

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

Therinnaiguy
  • 1420 Answers

SOURCE: Coleman forced air furnace blower

Rmove the two screws holding the blower in place and slide it out. With the power off, rotate the wheel and inspect for debris or an impingement. If everything turns easy, you have a bad motor or start capacitor. If you have rubbing, adjust the wheel. If the motor will not turn, replace it.

Posted on May 30, 2008

  • 4 Answers

SOURCE: Fix for coleman rv furnace

Check all limit switches and check power to gas control

Posted on Jan 06, 2009

mrgrzz
  • 88 Answers

SOURCE: furnace blower not working how it should

first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps

Posted on Jan 20, 2009

  • 252 Answers

SOURCE: HVAC

Could be a voltage problem, could be the motor or the run capacitor or the start capacitor (if it has one). Gonna need test equipment to diagnose this one. Check the input voltage both at rest and during start/operation. Use capacitor tester to test capacitors. If all else checks good, it's the motor. I bet it's a power supply problem though if you have two different motors with the same symptoms.

Posted on Mar 30, 2009

  • 1 Answer

SOURCE: Coleman furnace -- fan runs, ingniter won't light,

My furnace did not have a reset switch on that particular limiter. I unpugged the switch, it had 2 wires, waited 15 seconds or so and then plugged it back in . Turned the furnace back on and the limiter reset itself.

Posted on Dec 24, 2009

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Hi,
The chances are that the furnace was running when the power went out. This will cause the high limit switch to cutout and needs to be manually reset.
You will find that switch in the blower compartment near the blower. Usually somewher near the highest point of the cabinet.
Push the little red button firmly till it clicks.
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first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps

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