Whirlpool VMW Washer Goes Straight Into Drain Mode – Troubleshooting Guide

Problem:

Whirlpool VMW (Vertical Modular Washer) immediately starts draining when powered on or when a cycle is selected, without filling with water or agitating.

Possible Causes:

1. Pressure switch hose disconnected or leaking

2. Faulty pressure switch

3. Stuck or shorted drain pump relay on control board

4. Faulty main control board (MCU)

5. Washer thinks it’s in flood condition (false full tub signal)

6. Software or calibration error

Tools Required:

• Screwdriver

• Multimeter

• Flashlight

• Clear hose for testing (optional)

Step-by-Step Procedure:

1. Unplug Washer

• Always disconnect power before disassembly or testing.

2. Access Pressure Hose

• Tilt washer back or remove rear panel to locate the small rubber hose from the tub to the pressure switch.

• Inspect the hose for:

  • Disconnection

  • Cracks or pinholes

  • Blockages (blow through to test)

3. Inspect Pressure Switch

• Usually located near the control board at the top rear.

• Ensure hose is securely attached.

• If in doubt, replace the switch or test with a multimeter (check for switching when pressure is applied).

4. Check for Stuck Drain Pump Relay

• If the drain pump runs constantly even when unplugged and plugged back in, the relay on the control board may be stuck closed.

• No easy field repair – replace main control board if relay is faulty.

5. Run Diagnostic Mode

1. Turn dial to “off” position.

2. Rotate the knob as follows: right → right → right → left → right → (should enter diagnostics).

3. LEDs will blink – continue to auto test or manual test mode.

4. Observe whether washer recognizes proper water level.

6. Calibrate Washer (if needed)

• In diagnostic mode, run calibration cycle (C0).

• This recalibrates pressure readings and may fix false readings.

7. Test Drain Pump

• Run manual test for pump.

• Listen for normal sound (not loud or buzzing).

• If pump runs continuously or is noisy, test with multimeter or inspect for debris.

Normal Operation Notes:

• If the control board detects full tub when it shouldn’t, it enters drain mode to prevent flooding.

• A damaged or loose pressure hose is the most common reason.

Replace If Necessary:

• Pressure hose: if cracked, kinked, or detached

• Pressure switch: if not switching properly

• Main control board: if drain relay is stuck

• Drain pump: if stuck on or internally shorted