Maytag MTW6400TQ Top-load washer
Troubleshooting, fault codes and repair information for the Maytag MTW6400TQ, organized around the engineering platform this top-load washer is built on.
- Brand
- Maytag
- Model
- MTW6400TQ
- Engineering revisions
- MTW6400TQ0
- Appliance
- Top-load washer
- Platform
- Top-load washer platform, documentation from about 2006
- Models on this platform
- 28 across Maytag, Whirlpool
- Documented fault codes
- 22 with explanations
- Service diagnostic mode
- Yes — a console-only test mode used by technicians to read stored codes and run component tests
- Service documentation
- Tech sheet, service manual (used by our technicians; not published)
Maytag MTW6400TQ error codes
These are the fault codes documented for the platform this model belongs to. A code describes a condition the control detected; it does not by itself identify a failed part. Select a code for causes, safe checks and repair context.
| Code | Meaning | Areas involved |
|---|---|---|
| F1 | Primary control failure | Main control board, Water-level pressure sensor and hose |
| F2 | Keypad or console failure | User interface / keypad board |
| F40 | Water temperature sensor open or shorted | Temperature sensor (thermistor), Wiring harness and connectors |
| F41 | Motor sensor thermistor open or shorted | Drive motor, Wiring harness and connectors |
| F42 | Heater state unknown | Main control board |
| F43 | Heater stuck on | Main control board |
| F44 | Heater will not turn on | Main control board, Wiring harness and connectors |
| F50 | Motor stalled | Drive motor, Gearcase / transmission and basket drive, Wiring harness and connectors |
| F51 | Motor position sensor failure | Drive motor, Wiring harness and connectors |
| F52 | Motor did not stop | Drive motor, Main control board |
| F53 | Motor control overheating | Motor control / inverter board, Drive motor, Gearcase / transmission and basket drive |
| F54 | Motor control overcurrent | Motor control / inverter board, Drive motor, Gearcase / transmission and basket drive |
| F72 | Basket re-engagement failure | Gearcase / transmission and basket drive, Drain pump, Drive motor |
| HC | Hot and cold reversed | Water inlet valve, Temperature sensor (thermistor) |
| LF | Long fill | Water inlet valve, Water-level pressure sensor and hose, Main control board |
| Ld | Long drain | Drain pump, Water-level pressure sensor and hose |
| Po | Pump out (lid left open) | Lid lock assembly, Drain pump |
| Sd | Suds detected | Gearcase / transmission and basket drive, Drive motor |
| dL | Lid lock failure | Lid lock assembly |
| dU | Lid unlock failure | Lid lock assembly |
| oL | Overloaded | Gearcase / transmission and basket drive, Drive motor |
| uL | Unbalanced load | Suspension rods, springs and dampers |
Common washer problems
- Not draining
- Not spinning
- Not filling
- Not agitating
- Leaking
- Not starting
- Shaking or noisy
- Door or lid locked
- Stops mid-cycle
- Bad odor
Typical washer repair costs
| Repair | Typical range | Labor |
|---|---|---|
| Washer drain pump replacement | $180–$420 | Moderate |
| Washer water inlet valve replacement | $180–$360 | Light |
| Washer water-level pressure sensor repair | $180–$350 | Light |
| Top-load washer lid lock replacement | $180–$370 | Light |
| Washer drive motor replacement | $300–$720 | Heavy |
| Washer motor control board replacement | $280–$600 | Moderate |
| Top-load washer shifter replacement | $220–$460 | Moderate |
| Top-load washer gearcase / transmission replacement | $400–$880 | Major |
| Washer drive belt replacement | $180–$330 | Light |
| Washer suspension rods, springs or dampers replacement | $180–$440 | Moderate |
Typical total ranges for the Las Vegas area, parts and labor included. The final cost depends on diagnosis, the exact model, parts availability and whether other damage is found.
Repair or replace?
Washers typically last about 10–13 years. Service documentation for this platform dates from about 2006, so the oldest units built on it are now around 20 years old. The age printed in the serial number, the repair cost and the condition of the rest of the appliance decide it. Use the repair-or-replace guide.
Models built on the same platform
These models share this platform's service documentation, so fault codes and most diagnostic steps are the same.
- Whirlpool WTW6200SW
- Whirlpool WTW6200VW
- Whirlpool WTW6300SB
- Whirlpool WTW6300SG
- Whirlpool WTW6300SW
- Whirlpool WTW6300WW
- Whirlpool WTW6310WW
- Whirlpool WTW6340WW
- Whirlpool WTW6400SW
- Whirlpool WTW6410WW
- Whirlpool WTW6500WW
- Whirlpool WTW6600SB
- Whirlpool WTW6600SG
- Whirlpool WTW6600SW
- Whirlpool WTW6700TU
- Whirlpool WTW6700TW
- Whirlpool WTW6800WB
- Whirlpool WTW6800WE
- Whirlpool WTW6800WL
- Whirlpool WTW6800WU
- Whirlpool WTW6800WW
- Maytag MTW6300TQ
- Maytag MTW6500TQ
- Maytag MTW6600TB
- Maytag MTW6600TQ
- Maytag MTW6700TB
- Maytag MTW6700TQ
Need your Maytag MTW6400TQ repaired in the Las Vegas area?
We repair Whirlpool, Maytag, KitchenAid, JennAir, Amana and other Whirlpool-family appliances in Las Vegas, Henderson, Summerlin and Boulder City. A model number helps but is never required to book.