I have a York gas furnace (- P2MPD11408435) with a control board (Part#031-01234-000 Johnson Control). By turning the power on and off, the furnace works fine with the first cycle.....and after the desired temp is reached, the furnace turns off as it should. However, when the low temp on the thermostat control is reached, instead of the next cycle repeating, nothing happens and the Control Board LED has a single flash every 3 secs...The LED code says this means “Lockout – Check furnace”. If I turn the power off and wait about 20-30 minutes, the LED no longer blinks and I can then get the furnace to work again but for only one cycle again. I have replaced the Pressure limit switch, placed new filters and ensured that the inducer motor exhaust pipe is clean and unobstructed. I am now thinking about replacing the control board. any other thoughts/ideas?