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My furnace makes a loud noise on start up

My furnace blower makes a really loud noise on start up. well now it keeps making this noise. im not sure what to do i turned it off till we figure it out

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What kindof sound? Is it a squelling kind of sound?

Posted on Jan 03, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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Therinnaiguy
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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

  • 80 Answers

SOURCE: heater motor,fan making noise

Check to see if something is in the fan blades that is throwing it off balance. Also check the belt to see if it is ready to break.

Posted on Oct 02, 2009

james3751
  • 614 Answers

SOURCE: My cozy furnace makes a loud clicking noise every

Wall furnaces sometimes do that it is just expansion and conttraction of furnace. rus

Posted on Mar 17, 2010

  • 415 Answers

SOURCE: FURNACE MAKES STRANGE INTERMITTENT CLICK SOUND

Looks like an older system. Tighten all of your electrical connections. Inspect all of the low voltage wiring for any insulation cracks or other damage. The problem you describe sounds like something is either "shorting" or breaking down electrically. Unless the technician can catch it while he/she is there, it will be difficult to determine exactly what is happening. You might get lucky and resolve it yourself by tightening all electrical connections and reinsulating (use electrical tape) any damaged low voltage wire connections. If you continue to experience problems, get the tech. Hopefully the last company you used will be willing to work with you on the bill considering they were unable to "catch" it during the last visit.

Without being there with toolbox in hand, I hope you find this information very helpful moving forward. :-)

Posted on Mar 19, 2010

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  • 415 Answers

SOURCE: FURNACE MAKES STRANGE INTERMITTENT CLICK SOUND

Measure the voltage to Terminals #2 and #3 on the main gas valve. If the voltage remains consistent while you hear the sound and the burners diminish slightly, the problem will be your main gas valve. If the voltage fluctuates, you will have to trace it back through the wiring to see through which switch you are losing it.
If this furnace has a hot surface ignitor with flame sensor, try cleaning the flame sensor with some emory cloth.

I hope you find this information to be very helpful as a good starting off point for you.

Please leave a rating. :-)

Posted on May 14, 2010

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