I have the 3 flashes, on my TUE100, however I don't have 115v at the vent motor nor from the board (obviously). Does the board have a lockout and need to be reset. Or do I have a bad board? Sorry, n.e.i. I have a dual fuel system. I didn't check the second stage heat for 24v. I'll try that when I get back home. I went ahead and got a board at lunch time just in case.