I need to order a new circuit board for a Carrier 8000 WeatherMaker furnace. Can anyone recommend where, either Internet or locally in Northern Virginia, to order the board. Thanks.

Carrier parts can be hard to come by aftermarket wise. Usually you have to go to a Carrier dealer especially for parts for newer equipment.You might try


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Bryant Carrier Parts (http://www.arnoldservice.com/bryant_carrier_parts.htm)

Carrier Furnace Parts PAGE 1 (http://www.expertappliance.com/carrier-heating.html)