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3 flashes is pressure switch problem caused by fan not running. What is the age of furnace.
Got you. Does sound like a bad relay in board. Not that hard to replace if you want to buy it online. What did he quote you for board. Russ
That is not bad price for that board installed. Sound high but hat is lower than most. Usually about 800. Russ
Sorry but we can only go so far. You do ask the right questions. Thats good. Russ
Anymore questions. If not please rate me. Above 3 please or do not get paid. Russ
Thanks. You do ask the right questions. Very good. Please rate my answer. Thanks again. Really good working with you. Russ