if I were you, I'd click on the aop pro finder link at the top of the forum, and type in your address, then call the contractor closest to you on our list. if none are nearby, open the phone book and call the contractor that lists carrier/bryant/payne as their equipment of choice, and they can have the motor in your house in a week...
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Do you go to a boat repairman with a sinking boat, and tell him to put in a bigger motor when he tells you to fix the holes?
I am yourmrfixit