CMA Dishmachines Intermittent Power or Safety Interlock Trip

Machine stops mid-cycle and must be restarted manually.

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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

Loose power connection, Overheating motor tripping overload, Door/hood switch intermittent, High-limit thermostat opening

How to Fix / Troubleshooting

Safety first: Turn off power before tightening any electrical connections.

Step-by-step checks:

  • Check for error codes: If the display shows a code when it stops, troubleshoot that specific fault.
  • Inspect door/hood switch: Wiggle the door or hood gently during operation (if safe) to see if the machine stops, indicating a loose or failing switch.
  • Check motor overloads: After a stop, feel the motor housing (carefully). If very hot, the overload may be tripping due to overloading or failing bearings.
  • Inspect power connections: Tighten terminal block screws and check for discoloration or heat damage.

When to call a technician: Intermittent faults can be complex; a technician can monitor current draw and temperature to pinpoint the cause.

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Repair Difficulty

Medium 3/5

Required Part

Door Interlock Switch
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