Commercial fryer failure is both a revenue problem and a safety issue. A fryer with a failed high-limit thermostat that allows oil to overheat is a fire hazard. We treat commercial fryer calls as priority dispatch and always assess the high-limit safety system as part of every fryer diagnosis.
The $120 commercial diagnostic includes: oil temperature verification with calibrated thermometer, thermostat accuracy check, high-limit circuit test, ignition system assessment (gas), and heating element test (electric). Post-repair temperature verification is standard before we leave.