CMA Dishmachines Continuous Draining / Drain Valve Stuck Open

Machine drains immediately after filling and cannot maintain water level.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Drain solenoid stuck open, Debris preventing drain valve from closing, Misadjusted drain linkage, Failed drain pump check valve (if equipped)

How to Fix / Troubleshooting

Safety first: Turn off power and allow the machine to cool before working on the drain system.

Step-by-step checks:

  • Inspect drain valve: Access the drain valve assembly. Check for debris lodged in the valve seat and remove it.
  • Check solenoid operation: With power OFF, verify that the drain solenoid plunger moves freely and is not stuck in the open position.
  • Adjust linkage: Ensure the linkage between the solenoid and valve is correctly adjusted so the valve fully closes when de-energized.
  • Drain pump models: Inspect the pump check valve for debris or damage that could allow backflow.

When to call a technician: If the valve body is damaged or the solenoid coil has failed, replacement by a technician is recommended.

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Repair Difficulty

Medium 3/5

Required Part

Drain Valve Assembly
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