Whirlpool Refrigerator Defrost bi-metal thermostat WPW10165425, Replaces W10165425, 12639324SP

Genuine Whirlpool OEM defrost bi-metal thermostat. It protects the refrigerator evaporator from overheating during the defrost cycle.

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✅ Cross Reference Information

Common Symptoms

• Freezer does not defrost properly
• Visible frost buildup on the evaporator or freezer back panel
• Refrigerator section becomes too warm when airflow is restricted by frost
• Refrigerator may run excessively while cooling performance declines

Check Before Replacing

• Disconnect electrical power before accessing the component or its wiring.
• Inspect for heavy frost covering the evaporator; frost buildup can restrict airflow but does not by itself prove the thermostat is defective.
• With the thermostat isolated from the circuit and cold enough for defrost operation, check continuity with a multimeter; the thermostat should close when cold. An open reading when properly cold indicates a possible fault, but other defrost-system components should also be evaluated.
• Check the defrost heater and wiring separately rather than assuming the thermostat is the cause of a no-defrost condition.

Pro Tip

Part Details

Key Features

• Genuine Whirlpool OEM defrost bi-metal thermostat
• Temperature-operated safety/control device for the evaporator defrost circuit
• Clips onto the evaporator assembly in applicable refrigerator designs
• Protects the evaporator from overheating during defrost

Installation Notes

• Disconnect refrigerator power before service.
• Access is typically through the freezer evaporator area; the exact access sequence varies by refrigerator model.
• The thermostat must be positioned in its intended contact location on the evaporator assembly so it can sense evaporator temperature correctly.
• Reconnect the wiring securely and reinstall removed panels before restoring power.
• Use the model-specific service information for access details and any required wiring-connector procedure.

Verified Compatible Models

GB2SHDXPB12, GB2SHDXPS12, GB2SHDXPT12, GB9SHDXPQ12, GB9SHDXPS12, GX5FHDXTB11, GX5FHDXTS11, GX5FHTXTB11, GX5FHTXTL11, GX5SHDXTB11, GX5SHDXTL11, GX5SHDXTQ11, GX5SHTXTQ11, GX5SHTXTS11, GX5SHTXTT11

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.