Maytag Range Error Code 4d12

Code 4d12 means the control board detected a door switch position failure on the lower oven. Specifically, the door switch did not register a closed signal after the door lock was commanded to engage. The board expects confirmation from the door switch that the latch is secured, and when that signal is absent, it logs 4d12 and halts the operation.

Standard bake and broil functions may remain operational, but you should not attempt to run a self-clean cycle while 4d12 is active. The code indicates the control board cannot confirm the lower oven door is locked, which is a safety requirement for self-clean. Running high-heat cycles with an unverified door latch position is a safety risk. Repair the door switch or latch fault before using the self-clean feature.

Yes. Grease buildup or debris around the door latch area can prevent the latch from fully engaging, which keeps the door switch from reaching the closed position. Cleaning the latch mechanism and the area around the door frame with a degreaser is worth doing before replacing any parts. If cleaning resolves the mechanical binding and the switch actuates properly, the error code should clear on the next cycle.

Start by inspecting the lower oven door switch and its wiring harness for loose connectors, broken wires, or visible damage. Check that the door is properly aligned and closes without resistance. If the wiring is intact and the door closes squarely, test the door switch with a multimeter for continuity in the closed position. A switch that does not show continuity when pressed needs replacement. If the switch tests good, inspect the door lock motor and latch assembly for mechanical binding.

If the fix is a wiring connection or door realignment, there is no parts cost, only your time. A replacement lower oven door switch typically costs $15 to $50 in parts depending on the specific model. A full door lock motor and latch assembly runs $40 to $120 in parts. Professional labor adds $100 to $200 depending on your area. If the issue is a loose connector, this is a reasonable DIY repair for most homeowners with basic tools.