Automated Appliance Service LLC

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.

Preventive maintenance frequency depends on the equipment and usage volume. As a general guideline: fryers and ovens should be inspected every 3-6 months; refrigeration equipment annually or semi-annually; ice machines every 6 months (including cleaning and sanitizing); exhaust hoods quarterly to semi-annually per NFPA 96; and dishwashers quarterly. High-volume operations benefit from more frequent service intervals.