Re-frosting Due to Blocked Defrost Drain

Question

Accepted Answer

Drain outlet blocked by debris or ice. Check: Check drain pan and outlet during defrost (look for ponding) What to do: Check drain pan and outlet during defrost (look for ponding) → Flush drain with warm water and remove debris → Check drain heater continuity if equipped → Verify drain pipe slope and check for blockage → Run defrost cycle to confirm normal drainage Drain pipe frozen from drain heater failure. Check: Flush drain with warm water and remove debris What to do: Flush drain with warm water and remove debris → Check drain heater continuity if equipped → Verify drain pipe slope and check for blockage → Run defrost cycle to confirm normal drainage Improper drain slope or blocked drain pipe. Check: Check drain heater continuity if equipped What to do: Check drain heater continuity if equipped → Verify drain pipe slope and check for blockage → Run defrost cycle to confirm normal drainage

Re-frosting Due to Blocked Defrost Drain

Likely causes

Drain outlet blocked by debris or ice

Drain pipe frozen from drain heater failure

Improper drain slope or blocked drain pipe

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