SOURCE: I have a york furnace
Kill power to the unit. Replace the filter or clean it up real good. Then turn it back on after 30 minutes the board should reset.
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SOURCE: I have a York Diamond 80 furnace and am getting a
http://www.ehow.com/list_6543923_york-furnace-error-codes.html heres what i could find on these codes. the falt codes should be posted inside the furnace .
Well change filter but if filter is clean you might have a restriction on your return vent.
Make sure vent is clear
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