Orland hills, Illinois
Upon arrival found system shut off at the service switch and the hot surface igniter completely broken. Replaced the hot surface igniter, and cycled the system. After one successful ignition, notice the system circuit board powering down due to reversed polarity. Inspected furnace for proper polarity and checked the ohms across the igniter. System polarity is correct and the igniter is within manufacturers specifications for ohms. Recommending replacement of the furnace.
Orland Hills, IL