Control Board

I have a coleman furnace with a integrated control Board Model 7990-320p. my blower don't turn on.?
furnace heats up but the blower won't turn on . I bypass the control board and wired the blower direct to a plug and plug the blower in and comes on. do you think the board is my problem. I't don't have a fan switch .
Maybe, but more likely the fan control switch is faulty. It simply closes when the exchanger gets warm enough and then opens when it cools.
Should be able to identify it with the schematic on the panel.
Don't forget to check for loose wires and spade connectors.
Good luck!
!+!+!+!+!+!!+!+
On edit:
When you said you don't have a fan switch, I took it that you meant not on the t-stat. is this correct?
.
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