Hi,
I just replace my Trane control board CNT#3797, with a White Rodgers CNT#03797. Now, I am getting 3 flashing safety lights. I have already spent some much money and time on this... Its getting really frustrating.. the bad part is I called a professional and he can't figure out what wrong... like I said we replace the control board this unit will startup.. but now he's getting this 3 flashing lights. Please help!!