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Old 12-27-2011, 01:12 AM   #1
hwy
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Heil ntg9125 startup issue


My exhaust blower makes a rumbling noise when starting, ignites, blower motor kicks on, it blows hot air...the problem is the rumbling continues and then it pulsates. My guess is the exhaust blower needs replaced or could it be something else. Is it ok to run, I did shut the thermostat off. Any suggestions?
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Last edited by hwy; 12-27-2011 at 01:19 AM.
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Old 12-27-2011, 03:12 AM   #2
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Heil ntg9125 startup issue


you are correct, that motor has to go.....keep in mind the amount of work that motor does, it is responsible for drawing in the combustion air as well as making the pressure switch and expelling the exhaust gases, it spins at 3100 to 3500 rpm, your car engine isn't spinning that fast at highway speeds, it deals with temperature's above 300 degrees as well.

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Old 12-27-2011, 09:03 AM   #3
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Heil ntg9125 startup issue


From your brief discription it sounds like the little blower wheel on that vent motor is also am little off balance too.This means that you should get the venter assy and not just the motor. That will make an easier job of it too. Good Luck.
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Old 12-27-2011, 11:11 AM   #4
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Heil ntg9125 startup issue


yes get the entire inducer assy....not to bad to change either...
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Old 12-27-2011, 11:13 AM   #5
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Heil ntg9125 startup issue


Thank you! I appreciate the advice!
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