Sub-Zero Runs with Power Off

Cause:

  • Installation wiring
  • Internal wiring
  • Control board
  • Control panel

Topics:

  • Unit continues to run when turned off
  • Sub-Zero is still running with the power off
  • Should a Sub-Zero keep running after the power is turned off?
  • Sub-Zero does not turn off when the power is turned off

Steps to Verify Issue:

If the unit is a new installation, verify the unit is connected to a dedicated 15-amp, 120-volt power supply source.

Answer:

Units with an electronic control board:

  • Reset the circuit breaker that controls power to the unit.
  • If this step does not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

Units without an electronic control board:

  • Depending on the model, there may be two separate thermostat control knobs that need to be turned to the off position in order to turn off the unit.
  • It is possible for some older units to continue to run even with the thermostat control knobs turned to the off position.
    • To turn the unit off completely, turn off the unit's circuit breaker.
  • If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

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