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-   -   Furnace makes clunking noise when starting to cycle (http://www.diychatroom.com/f17/furnace-makes-clunking-noise-when-starting-cycle-162333/)

straightsix 11-05-2012 08:24 PM

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?

how 11-05-2012 08:34 PM

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?

ben's plumbing 11-05-2012 08:45 PM

sounds like something on inducer motor..thats the 1 st component to start on call for heat...ben sr

straightsix 11-05-2012 08:51 PM

Yes it is the first thing i hear when it starts. The noise is normal then?

Doc Holliday 11-05-2012 08:53 PM

I've come across a few furnace cabinets that as they expand or contract due to temp differentials the metal cabinets POPS.

ben's plumbing 11-05-2012 08:53 PM

Quote:

Originally Posted by straightsix (Post 1045651)
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.

straightsix 11-05-2012 09:59 PM

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


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