Whirlpool WRB329DMBM Repair Guide
A bottom-freezer that puts fresh food at eye level with the freezer in a drawer below. Bottom-freezers have one signature fault above all others: the defrost drain freezing shut.
Common problems & typical repair costs
| Problem | Likely cause | Typical fix | OEM part # | Typical cost |
|---|---|---|---|---|
| Sheet of ice across the freezer drawer floor | Defrost drain frozen shut — the signature bottom-freezer fault | Clear the drain and install the heater clip | — | $130–$280 |
| Fresh food warming, freezer cold | Evaporator fan motor failure | Replace evaporator fan | WPW10128551replaces W10128551, 8170894 | $200–$400 |
| Freezer drawer will not close flush | Rail misalignment or ice under the basket | Clear ice; realign or replace rail | — | $140–$320 |
| Warms and recovers periodically | Defrost heater or thermostat | Replace heater and bimetal | WP12729123⚠ Heater only — no defrost thermostat number is published here because the commonly cited one does not verify for this chassis | $220–$450 |
| Loud clicking every few minutes | Start relay failing | Replace relay and overload | — | $150–$320 |
Costs are national averages for professional repair (parts + labor). See the linked cost guides below for full breakdowns.
Error codes
| Code | What it means |
|---|---|
| Diagnostic mode | Door-switch sequence enters service mode |
| Cooling off | Cooling disabled at the panel — check before diagnosing |
Tech notes
Clear the drain and fit the heater clip as one job on any bottom-freezer with water at the front of the drawer. Clearing the ice alone lasts about three months and reads to the customer as a failed repair.
Sources
Where the safety, regulatory and warranty claims on this page come from. Repair costs are our own figures based on Arizona market rates and OEM parts pricing.
- Food Safety During a Power Outage FoodSafety.gov (U.S. Dept. of Health & Human Services) The 40°F threshold and the 2-hour rule for discarding perishable food.
- Stationary Refrigeration and Air Conditioning (Section 608) U.S. Environmental Protection Agency Refrigerant handling rules and the certification required to open a sealed system.
- Section 608 Technician Certification U.S. Environmental Protection Agency Which certification type covers household refrigerators and freezers.
Cost guides for this machine’s common repairs
DIY step-by-step instructions for this model
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