Whirlpool · Dishwasher

F8

Drain Circuit Fault

Severity

High

Your Whirlpool Dishwasher stopped working and is showing error F8, which corresponds to a fault called "Drain Circuit Fault". This is one of the most searched error codes for this appliance — you are not alone, and there is a clear fix.

Owner's Summary

Your Whirlpool dishwasher finished its program but dirty water is still sitting at the bottom. The filter is the first thing to check — it is the most common cause and takes under 10 minutes to clean.

Symptoms

Whirlpool dishwasher not draining, water in tub after cycle, F8 code

Common Causes

Clogged filter and sump area
Drain hose blocked or kinked
Faulty drain pump motor
Drain hose too deeply inserted into standpipe causing siphon

How to Fix

1 Clean dishwasher filter assembly thoroughly
2 Inspect drain hose for kinks under sink
3 Ensure drain hose is not inserted more than 6 inches into standpipe
4 Replace drain pump if filter and hose are clear

Tools You'll Need

Pliers Soft Brush Towels / Bucket Flashlight

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

The CCU activates the drain pump relay and monitors the pressure switch for a low-water signal. F8 is posted when the switch fails to confirm an empty sump within the maximum drain time — indicating blocked drainage or pump failure.

Is It Safe to Keep Using?

Fix same day. Standing water creates hygiene issues and prevents safe reuse.

Technician's Pro Tip

On Whirlpool dishwashers installed next to a garbage disposal, check that the drain hose has a high loop under the sink — the hose should rise to at least the height of the sink before dropping to the disposal inlet. Without this loop, dirty water siphons back in.

Related Codes

F21 — Whirlpool Washing Machine

Long Drain Time or Drain Pump Fault

High

F20 — Whirlpool Washing Machine

No Water Detected

High

F7E1 — Whirlpool Washing Machine

Motor Speed Sensing Error

High

Frequently Asked Questions

What does error code F8 mean on a Whirlpool Dishwasher?

Code F8 on a Whirlpool Dishwasher indicates "Drain Circuit Fault." In practice, the most common trigger is clogged filter and sump area. Severity is rated high, and typical repair costs range from $0 to $200.

Can I fix F8 myself, or do I need a technician?

Many cases of F8 can be resolved without a technician. The first step to try: clean dishwasher filter assembly thoroughly. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code F8 showing?

Fix same day. Standing water creates hygiene issues and prevents safe reuse.

How much does it cost to repair F8 on a Whirlpool Dishwasher?

Repair costs for code F8 typically range from $0 to $200. Filter cleaning: $0 DIY; Drain pump: $50–$200. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $200

Filter cleaning: $0 DIY; Drain pump: $50–$200