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The B3 error on your Maytag Washer means the control board has detected a button on the keypad that appears to be stuck or shorted, or in some models it points to a water temperature switch fault. Fixing it usually starts with a simple keypad and wiring check before anything is replaced.
| Error code | B3 |
|---|---|
| Meaning | Stuck key/button detected on the control panel, or a faulty water temperature sensor circuit |
| Severity | Medium — the washer will usually stop or refuse to start a cycle until resolved |
| Time to fix | 15–45 minutes |
| Tools needed | Multimeter, screwdriver (Phillips and flathead) |
What the B3 error means
On most Maytag top-load and front-load washers, the control board constantly monitors the keypad for input. If it senses that a button is being held down continuously — even when nothing is physically pressed — it throws a B3 code as a safety measure to stop the cycle. This is often caused by moisture, a worn membrane, or a wiring fault rather than an actual mechanical failure.
In some older models, B3 is instead linked to the water temperature sensor or thermistor circuit, meaning the board isn’t getting a valid signal for water temperature and halts the cycle to avoid filling with incorrect water settings.
Common causes
- A stuck or physically damaged button on the control panel
- Moisture or spilled detergent trapped under the keypad membrane
- A loose or corroded wiring harness connector behind the control panel
- A failing control board that misreads keypad signals
- A faulty water temperature switch or thermistor (on applicable models)
- Static buildup or electrical interference affecting the panel
How to fix the B3 error
- Power cycle the washer: Unplug it for 60 seconds, or switch off the breaker, then restart. This clears many temporary control board glitches.
- Inspect the keypad visually: Look for any button that seems physically stuck, cracked, or sticky from spilled liquid and gently work it free.
- Check for moisture damage: Remove the top control panel (unplug the washer first) and check for water staining or corrosion around the keypad ribbon connector.
- Test the wiring harness: With the washer unplugged, check that the connector between the keypad and control board is fully seated and free of corrosion.
- Test with a multimeter: If you’re comfortable doing so, test the keypad membrane and water temperature switch continuity against the manufacturer’s wiring diagram.
- Replace the faulty part: If the keypad membrane, harness, or control board tests faulty, replace the specific part rather than the whole panel where possible.
FAQ
Can I keep using the washer while it shows a B3 error?
It’s not recommended. The washer may stop mid-cycle or refuse to start reliably, so it’s best to diagnose the fault before running further loads.
Will unplugging the washer permanently fix B3?
Sometimes, if the cause was a temporary glitch or static charge. But if a button is physically stuck or the harness is damaged, the code will return until the part is repaired.
Is B3 related to other Maytag fault codes like F1 or F5?
They’re separate issues, though all point to control board communication problems. If you’ve ruled out B3-specific causes, it’s worth checking guides like the Maytag Washer F1 Error Code: Causes and Fixes or Maytag Washer F5 Error Code: Causes and Fixes guides for related control board troubleshooting steps.
