If your Whirlpool WRX735SDBM00 refrigerator is not cooling properly, food may spoil and ice may melt. Common causes include dirty condenser coils, blocked vents, a failed evaporator fan, ice buildup restricting airflow, bad temperature sensors, control board problems, or compressor issues.

This guide walks through the most common reasons a Whirlpool WRX735SDBM00 stops cooling, what to check first, which parts may be involved, and when it makes sense to call a technician.

Quick Answer: Why Is My Whirlpool WRX735SDBM00 Refrigerator Not Cooling?

• Dirty or clogged condenser coils

• Blocked air vents inside the fridge or freezer

• Evaporator fan failure

• Ice buildup in the freezer affecting airflow

• Faulty temperature sensor or thermostat

• Defective electronic control board

• Compressor not operating correctly

Safety Tips Before Troubleshooting

• Disconnect power before checking electrical components.

• Turn off the water supply if you are inspecting the ice maker or water lines.

• Do not poke sharp tools into coils, fans, or wiring.

• Call a qualified technician for sealed system, compressor, or refrigerant-related issues.

Step-by-Step Troubleshooting for WRX735SDBM00 Not Cooling

1. Check the Temperature Settings

Verify that the refrigerator and freezer temperatures are set correctly. A good starting point is 37°F for the refrigerator and 0°F for the freezer. After adjusting the settings, allow at least 24 hours for the temperatures to stabilize.

2. Inspect Air Vents for Blockages

Check the internal air vents in both the refrigerator and freezer compartments. Food containers, bags, or ice bins can block airflow and cause uneven or weak cooling. Move items away from the vents so cold air can circulate freely.

3. Clean the Condenser Coils

Pull the refrigerator away from the wall and clean the condenser coils using a coil brush or vacuum. On many units, the coils are located at the back or underneath the refrigerator. Dust and debris on the coils reduce cooling efficiency and make the compressor work harder.

4. Check the Evaporator Fan

Open the freezer door and listen for the evaporator fan. This fan moves cold air through the refrigerator and freezer. If it is not running, cooling performance will drop significantly and the fan motor may need replacement.

Replacement part: Evaporator fan motor – DA31-00007B

5. Inspect Ice Buildup

Ice buildup on the evaporator coil or inside the freezer can block airflow and reduce cooling. If you find heavy frost, manually defrost the unit and inspect the defrost system if the problem returns.

• Defrost heater: Model-specific

• Defrost thermostat: DA32-00006W

6. Test the Temperature Sensor

Use a multimeter to test the temperature sensor for continuity. If the sensor is out of range or faulty, the refrigerator may not regulate cooling correctly.

Replacement part: Refrigerator temperature sensor – DA32-00006W

7. Check the Electronic Control Board

Inspect the control board for visible burn marks, corrosion, or damaged connections. If the board is not sending power correctly to the fan, compressor, or defrost system, it may need to be replaced.

Replacement part: Electronic control board – model-specific

8. Check the Compressor

If the compressor does not run, clicks repeatedly, or runs constantly without cooling, professional testing is recommended. Compressor issues and sealed system faults are not simple DIY repairs.

Replacement part: Compressor – model-specific

Replacement Parts Guide for WRX735SDBM00 Not Cooling

Maintenance Tips to Prevent Cooling Issues

• Clean the condenser coils regularly.

• Do not block internal vents.

• Check door seals for gaps or wear.

• Replace water filters on schedule.

• Avoid overloading the refrigerator.

• Keep the freezer at the correct temperature.

FAQs: Whirlpool WRX735SDBM00 Not Cooling

Q1: Why is my WRX735SDBM00 refrigerator not cooling?

Check the condenser coils, evaporator fan, airflow, temperature sensor, and freezer ice buildup. Many cooling problems are caused by restricted airflow or missed maintenance.

Q2: How do I clean the condenser coils?

Unplug the refrigerator, pull it out, and use a coil brush or vacuum to remove dust and debris from the coils at the back or beneath the unit.

Q3: How long does it take for the fridge to cool after changing settings?

Allow at least 24 hours for the refrigerator to stabilize after changing the temperature settings.

Q4: Can a faulty water filter affect cooling?

Yes. A clogged water filter can reduce water flow to the ice maker and sometimes indirectly affect airflow or performance. If the filter is overdue, replace it.

Q5: When should I call a professional?

If the compressor is not running, the evaporator fan is working but cooling is still absent, or the control board is suspected, it is a good idea to contact a qualified technician.

Final Takeaway

Start with the basics: clean the coils, make sure the vents are open, verify the temperature settings, inspect the evaporator fan, and clear any ice buildup. Replace the water filter if it is overdue. If cooling problems continue after those checks, inspect or replace the temperature sensor, control board, or compressor using genuine replacement parts matched to your full WRX735SDBM00 model number.