Commercial True Refrigerator Error Code dH or dr

Encountering Error Code dH or dr on your Commercial True Refrigerator indicates a malfunction in the defrost heater. The defrost heater plays a vital role in periodically melting frost buildup on the evaporator coil. When this component fails, it can lead to excessive frost accumulation, hindering proper cooling and potentially causing damage to the evaporator coil.

Causes of Defrost Heater Failure:

1. Heater Element Damage: Over time, the heating element of the defrost heater may become damaged due to wear and tear, leading to failure.
2. Faulty Defrost Timer: If the defrost timer is malfunctioning, it may not initiate the defrost cycle properly, resulting in frost buildup.
3. Defrost Thermostat Issues: A defective defrost thermostat can prevent the defrost heater from activating when necessary, leading to frost accumulation.

DIY Solutions for Commercial True Refrigerator Error Code dH or dr:

1. Inspect Heating Element: Check the heating element of the defrost heater for any signs of damage, such as breaks or burns. If damage is detected, replace the heating element with a compatible replacement part.
2. Test Defrost Timer: Verify that the defrost timer is functioning correctly by manually advancing it through a complete defrost cycle. If the timer does not advance or appears to be malfunctioning, replace it with a new one.
3. Check Defrost Thermostat: Test the continuity of the defrost thermostat using a multimeter. If the thermostat does not show continuity when cold, it is likely defective and should be replaced.

Professional Assistance: If DIY solutions do not resolve the issue or if you are uncomfortable performing these tasks yourself, it’s recommended to seek professional assistance. A qualified technician, such as those at Commercial Appliance Repair, can diagnose the exact cause of the defrost heater failure and perform any necessary repairs or replacements to restore your Commercial True Refrigerator to optimal working condition.