Whirlpool Cooktop Error Code F-12 E-12

The F-12 E-12 error code on a Whirlpool cooktop indicates a coil under-current condition detected on the power control board, specifically affecting a single induction or electric burner. This is classified as a Type 1 failure, meaning the fault is isolated to one burner circuit rather than a board-wide or multi-zone issue. Under-current faults occur when the control board detects that the current flowing through a burner coil is lower than the expected operating threshold, which signals a break or high-resistance interruption somewhere in that burner's circuit.

The power control board monitors current through dedicated terminal connections labeled T2A/T2B and T3A/T3B, with each pair corresponding to a specific burner. When current drops below the acceptable range on one of these connections, the board logs the F-12 E-12 fault and disables that burner to prevent erratic or unsafe operation. The root cause is most often a loose, corroded, or disconnected terminal at one of these connection points, but a failed burner coil or a fault in the power control board itself can also produce this reading.

Diagnosis begins with disconnecting power to the cooktop and inspecting the T2A/T2B or T3A/T3B terminals on the power control board, whichever pair the affected burner is wired into. Technicians should check for secure seating, signs of arcing or heat damage, and corrosion on the connector pins. If the connections are intact and undamaged, the next step is evaluating the burner coil assembly for continuity and then assessing the power control board itself as a potential replacement item.