If your commercial refrigerator is freezing everything inside, the most common fix is simpler than you might think: check your thermostat settings and make sure your air vents aren’t blocked. In many cases, adjusting the temperature or rearranging your inventory solves the problem right away.
But if you’ve already tried that and things are still turning into ice blocks, there could be a deeper issue. Let’s walk through what to check—and when to call in a professional.
Thermostat Set Too Low
Most commercial fridges should sit between 35°F and 38°F. If yours is set lower, it’s likely the reason items are freezing.
Quick check: Manually test the thermostat and bump it up a couple degrees.
If that doesn’t work: Your thermostat sensor might be faulty and misreading the temperature.
Blocked or Misplaced Air Vents
Air needs to circulate freely. If vents are blocked by stacked items or packaging, cold air may pool and freeze food near the source.
Tip: Leave space around vents and avoid overpacking shelves.
Visual clue: Frost on the back wall or near vents often signals poor airflow.
Damaged Door Seals (Gaskets)
A cracked or loose door seal lets warm air in, making your unit work harder and overcool in response.
Look for: Cracks, warping, or gaps in the seal.
Quick test: Try the “dollar bill” trick—if you can pull it out easily from a closed door, your gasket may need replacing.
Defrost Cycle Not Working Properly
If your fridge isn’t defrosting as it should, frost can build up and affect temperature regulation.
Signs: Ice on the coils or inconsistent cooling.
What to do: You may need a technician to inspect the defrost timer or heater.
Faulty Thermostat or Control Board
If the thermostat and control board aren’t communicating properly, your compressor might run non-stop—causing freezing.
Don’t DIY this one: These are electrical components and should be diagnosed by a licensed tech.
What to Do Now
Start simple: adjust the temperature, check the vents, and inspect the door seal. If that doesn’t stop the freezing, it’s time to get professional help.
Need a hand? At Vanco Commercial Service, we specialize in —so your kitchen stays cold (but not too cold).
