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F
i40
Moderate
Frigidaire · Dishwashers
Drain Issue - Drain Flow Restricted or Blocked
Quick Answer
Error code i40 on your Frigidaire Dishwashers means: Drain Issue - Drain Flow Restricted or Blocked. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
FDPC4314ASFDSH4501ASFFCD2413USFGID2468UFGDSH4715AF
Likely Causes
  1. Partial blockage in the drain path causing slow but incomplete drainage
  2. Drain pump is running but not generating enough pressure due to a worn impeller
  3. Air gap or high loop is not functioning properly, causing siphon issues
  4. Household drain line is partially clogged, backing up water into the dishwasher
How to Fix It
1
Disconnect the drain hose from the sink drain or garbage disposal and flush it with water to check for internal blockage
2
Clean the air gap (if installed) by removing the cap and clearing the channels
3
Remove the dishwasher filters and inspect the drain pump cavity for debris
4
Test the drain pump by running a drain cycle and listening for normal pump operation
5
If the pump sounds weak or labored, the impeller may be worn and the pump should be replaced
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Drain pump (model-specific)
Drain hose
Air gap cleaning kit
Related Error Codes
i10i20i30i50i60
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