Tips for checking when your refrigerator stops cooling

When a Commercial Refrigerator Stops Cooling, Follow These Initial Self-Check Steps to Quickly Identify and Resolve Issues:

Check Power Supply

① Power Connection: Ensure the plug is securely inserted and the outlet is functional (test with another device).

② Circuit Breaker Status: Check if the circuit breaker in the electrical panel has tripped. Reset it and monitor for repeated tripping (indicating a short circuit or overload).

③ Voltage Stability: Use a multimeter to verify voltage matches requirements. Voltage fluctuations may prevent compressor startup.

Verify Temperature Settings

① Thermostat Settings: Confirm the control panel settings are correct (e.g., not accidentally set to “OFF” or high temperatures).

② Error Codes: If the display shows codes like “E1” or “E2,” consult the manual for error definitions.

Clean Condenser and Evaporator

① Clogged Condenser: Locate the condenser (usually at the back or bottom) and remove dust/debris using a soft brush or vacuum (poor airflow reduces cooling efficiency).

② Frosted Evaporator: For frost buildup (common in frost-free models), check if the defrost system has failed. Manually defrost and restart.

Inspect Door Seal Integrity

① Damaged Seals: Check door gaskets for cracks, deformation, or food residue. Clean with a damp cloth.

② Seal Test: Close the door with a piece of paper trapped. If easily pulled out, the seal is faulty. Replace the gasket or temporarily reshape it with a hairdryer.

Listen to Compressor Operation

① Startup Sounds: Listen for a humming/vibration from the compressor. If silent:

② Starter/Relay Issues: Lightly tap the compressor casing (to unstick it) or replace the starter.

③ Faulty Capacitor: Requires professional testing.

④ Continuous Weak Cooling: May indicate refrigerant leaks or compressor wear—contact a technician.

Check for Refrigerant Leaks

① Oil Stains: Look for oily residue near pipes or joints (refrigerant leaks often accompany lubricant seepage).

② Pressure Testing: Professionals must handle refrigerant checks—do not attempt DIY repairs.

Evaluate Usage Patterns

① Overloading: Ensure food items don’t block airflow. Leave 20% space free around vents.

② Frequent Door Opening: Excessive door openings or improper sealing can disrupt cooling. Train staff on proper use.

Other Potential Causes

① Fan Failure (Frost-Free Models): Listen for internal fan operation. A stalled fan halts airflow.

② Sensor Malfunction: Faulty temperature sensors may cause incorrect readings—require professional diagnosis.

If Unresolved

If cooling isn’t restored after these checks, contact a certified technician immediately. Avoid DIY repairs involving electrical components or refrigerants. Commercial units often require urgent service to minimize business disruption.

Tip: Keep records of unusual noises, error codes, or pre-failure operations to assist technicians in diagnostics. Regular maintenance reduces breakdown risks.

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