Maytag Dryer Error Code D22

The D22 error code on a Maytag dryer indicates a Latched Heat Relay Fault. This fault is triggered when the control board detects that the heat relay contacts are in a closed (conducting) position at a time when the heating circuit should be completely off. In a properly functioning dryer, the heat relay opens its contacts to interrupt power to the heating element or gas igniter circuit when heat is not called for. When the control senses that heat output is still present despite commanding the relay off, it immediately de-energizes an interposing relay as a safety measure to cut power to the heating system and prevent uncontrolled or continuous heating.

The root cause is almost always a failed heat relay with welded or fused contacts. Relay contacts can weld together due to electrical arcing, especially if the relay has been subjected to repeated high-current switching cycles over time, or if a downstream component like the heating element has caused an overcurrent event. When contacts weld shut, the relay can no longer open the circuit on command, and the control board detects voltage or continuity on the heat circuit when there should be none.

Because this fault involves uncontrolled heat, the control board is designed to respond aggressively by opening the interposing relay immediately upon detection. This is a protective shutdown, not a nuisance trip. Simply resetting the control will not resolve the underlying mechanical failure of the relay. The faulty relay or the control board assembly containing it must be inspected and replaced before the dryer can safely return to operation.