Sub Zero Refrigerator Service Code EC 24 – Troubleshooting Guide

Sub Zero is an American manufacturer of kitchen equipment with a 75-year history. Their products are considered on the higher end of the retail scale. The company boasts an enviable reputation for quality and customer service. However, even the best of products can have problems. One common issue noted by users of Sub Zero refrigerators is the EC 24 service code.

A Sub Zero refrigerator displaying an EC 24 service code reports that the automatic defrost system is not functioning correctly. This service code is usually related to an underheating problem by the defrost system. Clogged or dirty condenser coils may also be the cause of this service code.

Before calling a Sub Zero technician, try a few simple steps to reset the EC 24 service code and make sure your refrigerator operates normally. These preliminary instructions may remedy the problem and save you a costly service call. 

The automatic defrost system on your Sub Zero refrigerator keeps frost and ice from building up around the cooling components. Regular use allows moist room air into the refrigerator. The moisture in this air can condense and freeze around the fans, condensing coils and the sensors. 

Any build of frost and ice inside your Sub Zero refrigerator keeps it from operating at peak efficiency. The automatic defrost system on your Sub Zero refrigerator must work as it is intended. Sensors in your Sub0Zero refrigerator constantly monitor conditions, and if a low-heat situation is detected, a service code EC 24 results.

To remedy an EC 24 service code before calling a service technician, these steps are recommended. We suggest your try these fixes to reset the EC 24 service code yourself. Performing these steps is not difficult and well within reach of most homeowners.

Read: Why Is Fridge Making Rattling, Humming Or Buzzing Noise?

Make Sure the Door to Your Refrigerator or Freezer Hasn’t Been Left Open

A door left ajar on your Sub Zero refrigerator may result in an EC 24 Service Code. The constant air circulation in the freezer or refrigerator section can prevent the defrost system from operating properly. The net result is a service warning code. 

Close the doors to your refrigerator securely. Wait long enough for the refrigerator to cool down to normal operating temperature and check if the service code disappears. If the code is still visible, perform a manual reset by pressing and holding the Door Ajar Alarm Key for 15 seconds.

Check and Clean the Condenser Coils

If dirt, lint, or ice builds up on the condensing coils in your Sub Zero refrigerator, it can cause the defrost system to display an EC 24 service code. This may happen even if the interior temperature of your refrigerator is normal and everything appears to be operating properly.

Checking and cleaning the condenser coils is easily accomplished by following these simple instructions:

1. Turn off your Sub Zero refrigerator. There should be an on/off button on the control panel of the refrigerator.
2. Remove the upper grill from the refrigerator. This will allow you to access the condenser coils behind the grill. Some models have lift-out grills, while others will require you to remove some screws from the panel. Set the grill panel aside and put the screws in a safe place.
3. An appliance brush should be used to first remove any heavy accumulations of dust, lint, or other debris from the coils. Work carefully and gently, and try not to bend the fins on the coil.
4. A vacuum hose with a dusting brush is an excellent way to remove any fine dust or small debris from the coils. Again, take care not to damage or bend the coils.
5. Reinstall the grill panel on your Sub Zero refrigerator. Access the control panel and turn the refrigerator on. The EC 24 service code should be reset. If not, do a manual reset by pressing and holding the Door Ajar Alarm Key for 15 seconds.

Sub Zero suggests performing this cleaning procedure on your refrigerator every three to six months to ensure the most efficient operation.

Sub Zero is an American manufacturer of kitchen equipment with a 75-year history. Their products are considered on the higher end of the retail scale. The company boasts an enviable reputation for quality and customer service. However, even the best of products can have problems. One common issue noted by users of Sub Zero refrigerators is the EC 24 service code.

A Sub Zero refrigerator displaying an EC 24 service code reports that the automatic defrost system is not functioning correctly. This service code is usually related to an underheating problem by the defrost system. Clogged or dirty condenser coils may also be the cause of this service code.

Before calling a Sub Zero technician, try a few simple steps to reset the EC 24 service code and make sure your refrigerator operates normally. These preliminary instructions may remedy the problem and save you a costly service call. 

The automatic defrost system on your Sub Zero refrigerator keeps frost and ice from building up around the cooling components. Regular use allows moist room air into the refrigerator. The moisture in this air can condense and freeze around the fans, condensing coils and the sensors. 

Any build of frost and ice inside your Sub Zero refrigerator keeps it from operating at peak efficiency. The automatic defrost system on your Sub Zero refrigerator must work as it is intended. Sensors in your Sub0Zero refrigerator constantly monitor conditions, and if a low-heat situation is detected, a service code EC 24 results.

To remedy an EC 24 service code before calling a service technician, these steps are recommended. We suggest your try these fixes to reset the EC 24 service code yourself. Performing these steps is not difficult and well within reach of most homeowners.

Read: Why Is Fridge Making Rattling, Humming Or Buzzing Noise?

Make Sure the Door to Your Refrigerator or Freezer Hasn’t Been Left Open

A door left ajar on your Sub Zero refrigerator may result in an EC 24 Service Code. The constant air circulation in the freezer or refrigerator section can prevent the defrost system from operating properly. The net result is a service warning code. 

Close the doors to your refrigerator securely. Wait long enough for the refrigerator to cool down to normal operating temperature and check if the service code disappears. If the code is still visible, perform a manual reset by pressing and holding the Door Ajar Alarm Key for 15 seconds.

Check and Clean the Condenser Coils

If dirt, lint, or ice builds up on the condensing coils in your Sub Zero refrigerator, it can cause the defrost system to display an EC 24 service code. This may happen even if the interior temperature of your refrigerator is normal and everything appears to be operating properly.

Checking and cleaning the condenser coils is easily accomplished by following these simple instructions:

1. Turn off your Sub Zero refrigerator. There should be an on/off button on the control panel of the refrigerator.
2. Remove the upper grill from the refrigerator. This will allow you to access the condenser coils behind the grill. Some models have lift-out grills, while others will require you to remove some screws from the panel. Set the grill panel aside and put the screws in a safe place.
3. An appliance brush should be used to first remove any heavy accumulations of dust, lint, or other debris from the coils. Work carefully and gently, and try not to bend the fins on the coil.
4. A vacuum hose with a dusting brush is an excellent way to remove any fine dust or small debris from the coils. Again, take care not to damage or bend the coils.
5. Reinstall the grill panel on your Sub Zero refrigerator. Access the control panel and turn the refrigerator on. The EC 24 service code should be reset. If not, do a manual reset by pressing and holding the Door Ajar Alarm Key for 15 seconds.

Sub Zero suggests performing this cleaning procedure on your refrigerator every three to six months to ensure the most efficient operation.