Whirlpool Dishwasher Error Code F4 E3 — Drain Hose Not Installed Correctly
What this means
The F4 E3 error code on Whirlpool dishwashers indicates the drain hose is siphoning water out during the fill cycle. This happens when the drain hose does not have a proper high loop or air gap installation, allowing gravity to pull water out as fast as it fills. The control board detects the water level is not rising despite the fill valve being open.
Alternate codes: F4E3
Step-by-step fix
4 stepsCheck the drain hose routing
Pull the dishwasher out enough to see the drain hose routing. The drain hose must loop up as high as possible under the counter before going down to the sink drain or garbage disposal connection. This high loop prevents siphoning.
The high point of the loop should be at least as high as the sink drain connection — ideally near the underside of the countertop.
Secure the high loop
Use a zip tie or hose bracket to secure the drain hose at its highest point to the underside of the counter or the side of the cabinet wall. This prevents the hose from slipping down over time.
Some local plumbing codes require an air gap device (mounted on the sink deck) instead of a high loop. Check your local codes.
Check the air gap if installed
If your installation uses an air gap device on the sink, ensure it is not clogged. Remove the cap and inspect for debris. Clean the air gap passages thoroughly.
A clogged air gap can cause both filling and draining problems.
Run a test cycle
After correcting the drain hose routing, run a short wash cycle and verify the dishwasher fills and holds water properly. The F4 E3 code should not return.
If the code returns after proper drain hose installation, the water inlet valve or float switch may also need attention.
When to call a professional
If the drain hose is correctly installed with a high loop or air gap and the code persists, contact a plumber or appliance technician to check for other drainage issues.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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