Maytag Washer Error Code T-05

T-05 indicates a state mismatch between the User Interface board and the Appliance Control Unit. These two boards are supposed to stay synchronized on what the washer is doing at all times. When their internal status records conflict, the washer flags T-05 to alert the user or technician. The first recommended step is to cycle power by unplugging the unit for about one minute.

The washer will typically halt operation when T-05 is active, as the control system cannot reliably coordinate a wash cycle when the two boards disagree on the machine's state. Attempting to force operation is not recommended until the fault is resolved. Try a power cycle first, and if the error clears without returning, normal use can resume.

If the fix is simply a power cycle or a reseated wiring connector, there is no parts cost involved. If a UI board replacement is needed, parts and labor typically range from around 150 to 300 dollars depending on the specific model and local labor rates. An ACU replacement can cost more, generally in the range of 200 to 400 dollars or higher, making professional diagnosis worthwhile before ordering components.

In many cases, yes. Unplugging the washer from the outlet for approximately one minute and then restoring power forces both control boards to reinitialize from the same starting state, which can clear the mismatch. If T-05 returns after the reset, a hardware fault in the wiring, UI board, or ACU is likely and further diagnosis is needed.

Start by unplugging the washer for one minute and restarting it. If the error clears, monitor the machine for recurrence. If T-05 comes back, inspect the wiring harness connecting the UI board and ACU for loose connections or damage. Persistent faults after wiring checks are corrected typically point to a defective UI board or ACU that will need to be replaced.