Maytag Dryer Error Code D23

The D23 error code on a Maytag gas dryer signals a Burner Return Voltage Fault. This fault occurs when the control board detects an active burner return signal at the same time that the heat relay contacts are in the open position. In normal operation, when the heat relay opens, the burner circuit should be de-energized and no return voltage should be present. When the control detects this contradiction, it interprets it as a potentially dangerous condition and responds by immediately shutting down the heating system and opening the interposing relay to isolate the circuit.

The interposing relay serves as a secondary switching layer between the main control board and the burner assembly. When D23 triggers, the control opens this relay as a protective measure to cut any unintended current path to the burner. This points to a wiring or component fault that is allowing voltage to feed back through the burner return line when it should not be present. The most likely culprits are failed relay contacts that have welded closed, a short or miswire in the burner return circuit, or a faulty control board that is misreading the signal state.

Because this fault involves the gas burner circuit, the control board treats it as a critical safety condition rather than a recoverable operational error. The immediate shutdown behavior is intentional and is designed to prevent uncontrolled or unexpected burner activation. Diagnosis should focus on confirming whether the heat relay contacts are physically open when commanded, tracing the return signal line for shorts to voltage sources, and verifying that the control board is correctly interpreting relay state signals.