CFESA Cheat Sheet 2026

The 30 highest-yield CFESA facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which repair is indicated when a commercial glass door merchandiser has condensation forming on the exterior of the glass during normal operation? → Inspect and replace the door glass anti-sweat heater circuit or increase its duty cycle
2. When using a clamp meter to diagnose a commercial cooking appliance, a technician measures amp draw significantly above nameplate rating. This indicates: → A possible short circuit, failed component drawing excess current, or mechanical binding
3. Which business metric should a food equipment service technician track to demonstrate value when seeking a promotion to lead technician? → First-call completion rate and customer satisfaction scores
4. A commercial combi-oven displays an error for high steam chamber pressure. After verifying the drain is clear, what component should be inspected? → The steam generator pressure relief valve and pressure transducer
5. What does the EPA's SNAP (Significant New Alternatives Policy) program regulate? → New refrigerants and substitutes for ozone-depleting substances
6. Which tool is commonly used to measure electrical components in commercial food equipment? → Multimeter
7. What is the correct manifold pressure for commercial LP (propane) gas equipment? → 11 inches W.C.
8. When repairing a commercial soft-serve machine that produces product with excessive air incorporation (too foamy), which component is most likely at fault? → The overrun adjustment valve or air pump system delivering too much air to the mix
9. A commercial refrigerator compressor hums but does not start. The technician confirms proper voltage at the compressor terminals. What should be tested first? → Start relay and start capacitor
10. During commissioning of a new gas convection oven, the CO reading in the flue gases is 800 ppm air-free. What action is required? → Shut down the appliance immediately and do not operate until repaired
11. A food establishment is cited for having a reach-in cooler that does not maintain proper temperature. Which regulatory body most likely issued the citation? → Local health department
12. How does earning manufacturer-specific factory training typically benefit a CFESA technician's career? → It qualifies the technician as an authorized service provider for that brand
13. How can CFESA-certified technicians improve operational efficiency during service calls? → By conducting thorough diagnostics and having common parts on hand
14. What is the primary purpose of a phase-loss protection relay in three-phase commercial food equipment? → To shut down the equipment if one of the three supply phases is lost
15. When calibrating a commercial convection oven thermostat, a technician finds it reads 25°F high. The correct action is: → Adjust the calibration screw per manufacturer specification to correct the offset
16. When transitioning from a field technician role to a service manager position, which skill is most critical to develop? → Team leadership and personnel management
17. A technician measures a high head pressure and normal suction pressure in a walk-in cooler. The most likely cause is: → Dirty condenser coils
18. What is the correct procedure for re-torquing cylinder head bolts on a commercial food equipment compressor after initial repair? → Torque cold in a star pattern to spec, then recheck after first thermal cycle
19. When performing PM on a commercial tilting skillet (braising pan), a technician should lubricate the: → Tilt mechanism pivot points and gear assembly per manufacturer specifications
20. Which NSF standard specifically governs the design and construction of commercial warewashing equipment? → NSF/ANSI 3
21. A CFESA-certified technician notices safety code violations on equipment while performing a routine service call. What is the appropriate professional response? → Document the violations, inform the customer in writing, and recommend corrective action
22. A steam kettle is producing insufficient steam pressure. After confirming adequate water supply, what is the next diagnostic step? → Check and clean the steam generator scale buildup and inspect the safety valve
23. What is the typical symptom of a failing motor capacitor in a commercial mixer? → The mixer not starting or struggling to start
24. Which standard establishes the energy efficiency requirements that commercial refrigerators must meet to qualify for the ENERGY STAR program? → DOE 10 CFR Part 431
25. A gas range burner produces a yellow, lifting flame instead of a blue cone flame. What is the most likely cause? → Insufficient primary air or partially blocked air shutter
26. A commercial dishwasher's wash arms are not rotating. The pump motor runs normally. What is the most likely cause? → Clogged or blocked wash arm ports
27. What condition is indicated when a compressor's suction line frosts heavily all the way back to the compressor? → Overcharge of refrigerant or a flooding TXV
28. Which of the following actions can help a technician become a candidate for managerial positions within a CFESA-certified business? → Demonstrating strong leadership abilities and effective team management
29. A commercial convection oven's gas valve fails to open when the thermostat calls for heat. After confirming 24V at the valve, the technician should: → Replace the gas valve
30. A commercial refrigeration system is short-cycling on the high-pressure cutout after a condenser coil cleaning. What is the most likely cause? → Overcharge of refrigerant introduced during service