Sub-Zero Refrigerator Error Code 15 1 00

Error code 15 1 00 means the Zone 1 compressor relay is stuck open and no current is being detected in the compressor circuit. The refrigerator's control system expected to see a load when the relay closed, but found none. This indicates a problem with the relay itself, the inverter board, the wiring harness, or the compressor. A technician should inspect all components in this circuit to identify the specific failure point.

If the Zone 1 compressor is not running due to this fault, the refrigerator will not maintain safe food storage temperatures in that zone. Continuing to store perishable food in an affected compartment could lead to spoilage. It is recommended to address the fault promptly and transfer perishables to another refrigerator if cooling is insufficient.

A power reset may temporarily clear the error code from the display, but if the underlying fault in the compressor relay circuit is still present, the code will return once the control system runs its diagnostics again. Resetting the unit does not repair failed components such as a faulty inverter, open relay, or damaged wiring. A proper repair addressing the root cause is required to permanently resolve the fault.

Some basic checks, such as inspecting wiring connections and ensuring all harness connectors are fully seated, can be done by a knowledgeable homeowner. However, testing the inverter board, relay, and compressor windings requires electrical diagnostic tools and familiarity with refrigeration systems. Most repairs associated with this code, including component replacement, are best handled by a qualified appliance technician.

Repair costs vary depending on which component has failed. Wiring repairs may cost relatively little in parts but require labor time for diagnosis. An inverter board replacement typically falls in the range of several hundred dollars in parts plus labor. Compressor replacement is the most expensive scenario, often ranging from several hundred to over a thousand dollars depending on the model. Getting a diagnostic visit from a Sub-Zero authorized technician will provide an accurate estimate.