WRB322DMBM03 Refrigerator Not Cooling — What Part Fixes This?
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Understanding the Problem
If your Whirlpool WRB322DMBM03 shows a cold freezer but the fresh-food compartment is warm (or the fridge runs constantly), the problem commonly stems from airflow or refrigeration components. In many top-freezer Whirlpool models the freezer houses the evaporator and fan that circulate cold air to the fridge. If that fan fails, the evaporator is iced over, or the damper/thermistor that controls airflow is faulty, the refrigerator compartment will not receive cold air even though the freezer remains cold. Other causes include a faulty start relay/overload on the compressor, a failing compressor (rare but possible), or a defrost system failure that allows heavy frost buildup on the evaporator coil. Before replacing major sealed-system parts, you can narrow down the fault with a few simple inspections: check for frost on the evaporator, listen for the evaporator fan running when the compressor is on, verify condenser coils are clean, and test temperature sensors/thermostats. Always unplug the fridge before performing hands-on tests and use a multimeter for electrical checks.
Common Symptoms
Freezer stays cold but refrigerator section is warm; compressor runs constantly or cycles frequently; frost or ice buildup on the evaporator panel; weak/no airflow from freezer-to-fridge vents; clicking noises or no evaporator fan operation.
Common Causes
- Evaporator fan motor failure or blocked airflow (fan not circulating cold air to fridge)
- Defrost system failure leading to heavy frost on evaporator and blocked airflow
- Start relay/overload or compressor problem preventing proper refrigerant circulation
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
To confirm the likely faulty part quickly: put your hand near the evaporator access (freezer back panel) after the compressor has run for 10–15 minutes — if the freezer is cold but you hear no fan or there’s heavy frost on the evaporator, suspect the evaporator fan motor or defrost system. Use a multimeter to check continuity on the fan motor and defrost heater; check for 120V at fan and compressor terminals when the unit is running.
Frequently Asked Questions
How do I tell if it's the evaporator fan motor or the compressor causing poor cooling?
Start with audible and tactile checks: when the compressor is running, place your ear near the freezer and listen for the evaporator fan; you should also feel airflow from freezer vents into the fridge. If the compressor runs but you hear no fan or no airflow, the evaporator fan motor is the likely culprit. If neither the compressor nor the fan runs (compressor silent, clicking or hot to the touch), check the start relay/overload — a failed relay is a common cause. Frosted-over evaporator coils point to a defrost failure rather than a compressor fault. Use a multimeter to test continuity on the fan motor and the start relay; measure voltage at the fan and compressor terminals if you are experienced and the unit is energized (exercise caution).
Can I replace these parts myself or do I need a professional?
You can replace simple parts yourself (evaporator fan motor, thermistor, defrost heater) if you are comfortable with basic appliance repair and safety (unplugging unit, removing panels, using a multimeter). However, sealed-system work (compressor, evaporator coil leaks, refrigerant) requires a certified HVAC/refrigeration technician with EPA certification and specialized tools. If diagnostics point to a sealed-system fault or you're unsure, call a professional to avoid voiding warranties or causing refrigerant hazards.
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