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Error Code Reference

KitchenAid Refrigerator Error Code dH

The dH error code indicates a defrost heater malfunction or defrost cycle failure on your KitchenAid refrigerator. This prevents proper defrosting of the evaporator coils, which can lead to ice buildup and reduced cooling performance.

Technical Advisory
Home › Error Codes › KitchenAid Refrigerator Error Code dH

Signs

What you may observe

• Frost or ice accumulation on evaporator coils or freezer walls • Refrigerator not cooling to proper temperature • Freezer compartment not maintaining cold temperatures • Water pooling at the bottom of the refrigerator • Error code dH displayed on the digital display panel • Unusual frost patterns in the freezer section • Reduced airflow from vents

Possible Causes

Root causes behind this error

• Defrost heater element failure or malfunction • Defrost thermostat not functioning correctly • Defrost timer circuit board issue • Faulty defrost control board • Broken or disconnected defrost heating element wiring • Clogged defrost drain line preventing water drainage • Failed defrost sensor • Power supply issue to the defrost heating system • Control board software glitch requiring reset

Safety Checks You Can Do

Steps you can try at home safely

• Check your home's circuit breaker to ensure the refrigerator circuit is on and not tripped; reset if necessary • Verify both the refrigerator and freezer doors are closing completely and sealing properly • Confirm temperature settings are appropriate (typically 37-40°F for refrigerator, 0°F for freezer) • Inspect and clear any visible ice blockages in the defrost drain at the back or bottom of the unit • Ensure adequate clearance around the refrigerator (at least 1 inch on sides, 2 inches on back) for proper airflow • Clean the front-facing condenser coils with a coil brush if accessible without disassembly • Check that nothing is blocking air vents inside the refrigerator or freezer compartments • Unplug the refrigerator for 60 seconds or turn off the circuit breaker for 60 seconds, then restore power to attempt a complete system reset • Allow 24 hours after reset for the defrost cycle to complete before evaluating if error persists
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