Maytag Oven Error Code 1c5c

Error code 1c5c on a Maytag oven indicates a VCC or ground fault condition detected at a test point on the control board. VCC refers to the supply voltage that powers the logic circuits of the electronic control board. During an active cook or clean cycle, the board continuously monitors this internal supply voltage at a designated test point. If the voltage falls outside its specified range, or if a ground reference is out of specification, the board logs this fault code. Notably, the control takes no automatic corrective action when this fault is detected, meaning the oven may continue operating while the fault is present.

The root cause of this error typically involves the power supply section of the control board itself, the incoming AC power feeding the board, or a wiring issue that is corrupting the voltage rails. The control board converts incoming AC line voltage into the regulated DC voltages needed to run its microprocessor and relay circuits. If any component in that conversion path is degraded, such as a failing capacitor, voltage regulator, or solder joint, the VCC or ground reference at the test point can drift out of acceptable limits. External factors like fluctuating line voltage, loose terminal connections, or a failing power source (such as a household circuit with poor connections) can also produce this condition.

Diagnosis should begin by checking the power supply voltages delivered to the control board at the relevant test points using a digital multimeter. Confirm that the incoming line voltage to the unit is within the expected range. Inspect all wiring harness connectors to and from the control board for looseness, corrosion, or heat damage. If incoming power and wiring check out, the control board itself is the likely faulty component, as the internal voltage regulation circuitry may have failed.