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Old 11-05-2012, 08:24 PM   #1
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Furnace makes clunking noise when starting to cycle


Its a Rheem 90 high effiecincy . when it starts to turn on to cycle, i can hear a few clunky sounds right in the begining. Furnace seems to work fine and blows warm air but the noises seem unusual. it does not have pilot light, so i thinkin it might be the ignition coil thing, but not sure. any ideas? this normal?

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Old 11-05-2012, 08:34 PM   #2
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Furnace makes clunking noise when starting to cycle


When the thermostat first calls for heat, the first thing you'll hear is the inducer motor starting up. Is the clunking sound the first noice you can hear from the furnace starting up?

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Old 11-05-2012, 08:45 PM   #3
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Furnace makes clunking noise when starting to cycle


sounds like something on inducer motor..thats the 1 st component to start on call for heat...ben sr
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Old 11-05-2012, 08:51 PM   #4
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Furnace makes clunking noise when starting to cycle


Yes it is the first thing i hear when it starts. The noise is normal then?
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Old 11-05-2012, 08:53 PM   #5
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Furnace makes clunking noise when starting to cycle


I've come across a few furnace cabinets that as they expand or contract due to temp differentials the metal cabinets POPS.
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Old 11-05-2012, 08:53 PM   #6
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Furnace makes clunking noise when starting to cycle


Quote:
Originally Posted by straightsix View Post
Yes it is the first thing i hear when it starts. The noise is normal then?
no its not normal to hear a clunking sound...something is wrong inside inducer motor.
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Old 11-05-2012, 09:59 PM   #7
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Furnace makes clunking noise when starting to cycle


Oh ok. Thanks for the replies. I truly appreciate it

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