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The induction motor on a Trane can be very expensive compared to ones on other brand furnaces. I was waiting on a callback from my parts supplier to get a price but he failed to return my call. So far I have found the part starting at $325 to $600 for the same part. If it were my furnace I would not replace the motor at this time. I would wait and see if the noise returned. $3000 for a Trane furnace is not out of line but there are many furnaces available at a lesser price but with good dependability and warrenty. The last HVAC system I replaced cost the customer a little less that $2000. That was a York 10 000 BTU furnace and air conditioner. Click here to see the fuel savings a new furnace could provide. Click here to view the different York furnaces. Many come with a 10 year guarantee and a lifetime on the heat exchanger. As I said I do not believe you need a furnace at this time but I included the information for future reference.
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