CMA Dishmachines No Power / Dead Control

Dishmachine will not power on; no lights or display, no response from controls.

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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

Tripped circuit breaker, Blown internal fuse, Faulty power switch, Loose line voltage connections at terminal block

How to Fix / Troubleshooting

Safety first: Before opening any panels, ensure the breaker is OFF. Only qualified persons should work on line-voltage wiring.

Step-by-step checks:

  • Check building breaker: Verify the breaker feeding the CMA dishmachine is not tripped. Reset if necessary and observe if it trips again (which indicates a fault).
  • Inspect power cord/connection: Confirm the machine is properly plugged in or hard-wired and that there are no burned or loose connections at the terminal block.
  • Test power switch: With power OFF, access the main power switch. Use a meter to verify continuity when switched ON. Replace if defective.
  • Check internal fuses: Some CMA models have control fuses. Inspect and replace only with the exact type and rating specified by CMA.

When to call a technician: If breakers trip repeatedly or you find burned wiring, stop and contact a qualified CMA service technician immediately.

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Repair Difficulty

Medium 3/5

Required Part

Main Power Switch
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