Sub-Zero Refrigerator Error Code 58: Compressor Overcurrent Troubleshooting
Sub-Zero fridge displaying Error 58? Diagnose and fix compressor overcurrent issues with our expert troubleshooting guide. Get your Sub-Zero cooling again!
Sub-Zero fridge displaying Error 58? Diagnose and fix compressor overcurrent issues with our expert troubleshooting guide. Get your Sub-Zero cooling again!
Compressor winding resistance values vary significantly based on the model and compressor type. Consult the specific service manual for your Sub-Zero refrigerator. However, a general rule is to look for very low resistance (a few ohms) between the common, start, and run terminals and a very high resistance (megohms) between each terminal and the compressor body (ground).
Before testing a capacitor, it must be discharged to prevent electrical shock. Use a resistor (around 20,000 ohms, 2 watts) to slowly discharge the capacitor. Connect the resistor leads to the capacitor terminals and allow a few minutes for the discharge. Verify with a multimeter that the voltage across the capacitor terminals is near zero before handling.
Sub-Zero service manuals can often be found on the Sub-Zero website or through authorized service providers. You may need the model and serial number of your unit to locate the correct manual. Online appliance parts retailers may also offer access to service manuals.
The MCU monitors the current draw of the compressor. When the current exceeds a predetermined threshold for a specific duration, the MCU interprets this as an overcurrent condition and shuts down the compressor to prevent damage. The voltage path includes the main power supply to the MCU, the relay controlled by the MCU, and the wiring harness connecting the relay to the compressor.
Homeowners often report that the refrigerator is not cooling, and they may hear clicking sounds from the compressor area. The error code 58 is displayed on the control panel. The compressor may attempt to start and then shut down quickly.
Always disconnect power to the appliance at the breaker panel before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures to prevent accidental energization. Be aware of high voltage circuits and take necessary precautions to avoid electrical shock.
Regularly clean the condenser coils to ensure proper heat dissipation. Ensure the refrigerator is not overloaded, which can cause the compressor to work harder. Inspect the door seals for proper sealing to prevent excessive compressor run time.
Many Sub-Zero models have a service mode. Entering service mode will allow you to manually run the compressor for testing purposes. Refer to the service manual for the specific sequence for your model. Often involves pressing specific button combinations on the control panel.