PREVENTIVE MAINTENANCE

FAQs

Commercial Refrigerator Troubleshooting Guide

Common Failures, Causes & Solutions

Possible Causes:

  • Dirty condenser coils
  • Refrigerant leak
  • Faulty thermostat or controller
  • Compressor failure
  • Blocked airflow (inside cabinet or behind unit)

What to Do:

  • Clean condenser coils
  • Verify temperature setpoints (Refrigerators 34°F – Freezers -8 °F)
  • Check for blocked vents or overstocking
  • If issue persists → Call a technician (possible refrigerant or compressor problem)

Possible Causes:

  • Faulty probe/thermostat
  • Heavy product load
  • Doors left open or gasket damage
  • Poor ventilation around the unit

What to Do:

  • Ensure doors close tightly and gaskets are intact
  • Spread products evenly, avoid blocking fans
  • Clean condenser coils
  • Check for ice buildup on evaporator
  • If issue persists → Call a technician

Possible Causes:

  • Frequent door openings
  • Worn gaskets letting warm air in
  • Poor circulation due to blocked shelves

What to Do:

  • Limit door openings
  • Replace damaged gaskets
  • Keep vents clear inside cabinet

Possible Causes:

  • Power supply issue
  • Turn ON rocker switch
  • Tripped breaker or blown fuse
  • Faulty controller or start relay
  • Compressor failure

What to Do:

  • Check outlet and breaker panel
  • Plug unit into different outlet.
  • Make sure unit is connected to a dedicated outlet. (No extension cords)
  • Call a technician if power source is good but unit still won’t start

Possible Causes:

  • Failing condenser/evaporator fan
  • Loose or vibrating components
  • Compressor problem

What to Do:

  • Identify noise location (back, inside, or underneath)
  • Tighten loose panels or hardware
  • Call a technician if fan or compressor noise persists

Possible Causes:

  • Clogged drain line
  • Cracked or missing drain pan
  • Excess condensation due to bad gaskets
  • Humid environment causing condensation

What to Do:

  • Check for clogged drain line
  • Inspect drain pan for damage
  • Replace door gaskets if worn

Possible Causes:

  • Failed defrost heater
  • Faulty temperature probe
  • Airflow restriction
  • Doors left open too long
  • Blocked vents or overstocking

What to Do:

  • Defrost manually to clear ice, empty refrigerator, disconnect equipment and let it defrost with doors open for 24 hours.
  • Check gaskets and airflow
  • Check if evaporator fan is working (pressing doors switch only on reach inns)
  • Call a technician if ice returns quickly

Preventive Maintenance Tips

When to Call a Technician Immediately:

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