Maytag Oven Error Code 4d22

Code 4D22 means the UH control board in the lower oven detected no rotation or dangerously low RPM from the reverse airflow convection fan motor during a cook or clean cycle. The control disables all cooking functions in the lower cavity when this fault is active. The problem is either the fan motor itself, the wiring harness connecting it to the control board, or a blocked fan blade.

Start by inspecting the wiring harness and connectors between the lower oven convection fan motor and the control board for damage, loose plugs, or burn marks. If the wiring looks intact, manually check whether the fan blade spins freely or is obstructed. If the blade is clear and wiring is good, test the fan motor for continuity using a multimeter; a motor with an open winding will need to be replaced. If all hardware tests pass, the UH control board may be the source of the fault.

Clearing the code by resetting power to the oven will temporarily remove the fault display, but 4D22 will return as soon as the lower oven attempts to run a cook or clean cycle if the underlying issue has not been fixed. The control board checks the convection fan RPM every time a cycle starts, so the root cause must be addressed before the oven will function normally again.

No. When 4D22 is active, the control board disables all cooking functions for the lower oven cavity. You cannot bake, broil, or run a self-clean cycle in the lower oven until the fault is cleared. If your model has a separate upper oven, that cavity may still be operational depending on the configuration.

If the convection fan motor is the cause, replacement motors for lower oven cavities typically range from $40 to $120 in parts. A wiring harness repair may cost less if only a connector needs replacement. If the UH control board is at fault, boards can range from $100 to $250 or more depending on the model. Adding professional labor, expect a total repair cost between $150 and $400. Diagnosing and replacing the motor is a manageable DIY repair for someone comfortable working with oven components, but control board replacement on a UH-controlled unit benefits from professional verification.