SOS Plumbing & Drain Services

Commercial refrigerators must maintain 40°F (4°C) or below for food safety compliance. Walk-in freezers should be at 0°F (-18°C) or below. Many food safety programs require refrigerators to run at 35-38°F for proper margin. If your unit struggles to maintain proper temperature, especially during busy service periods or in hot kitchen environments, call a technician — compressor capacity or refrigerant levels may be the issue.

The hi-limit switch is a safety device that cuts power when fryer temperature exceeds safe limits. Common causes: faulty thermostat allowing oil to overheat, failing hi-limit switch itself, improper temperature settings, low oil level exposing heating elements, or carbon buildup insulating heating elements. Never bypass the hi-limit switch — it prevents fires. Call a technician to diagnose the root cause.

Commercial fryer safety checks include: verifying hi-limit switch operation, checking thermostat accuracy, inspecting gas connections and pressure (gas fryers), testing electrical connections (electric fryers), checking oil filtration system function, inspecting drain valve operation, verifying fire suppression system compatibility, and checking for oil leaks. Safety checks should be performed by a certified technician at every service visit.