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Whirlpool Dishwasher Sanitize light flashing Error Code

Load was not sanitized. Here is what it means and how to clear it, easiest fix first.

How to fix Whirlpool Sanitize light flashing

1. Check the hot water

   Open the hot tap at the sink nearest the dishwasher, let it run for about 30 seconds, and measure the temperature with a kitchen thermometer. Whirlpool's minimum is 120°F (49°C); if it is cooler, turn the water heater up a little.

2. Leave the door shut

   Let sanitize cycles finish without opening the door, which lets heat escape.

3. Reset and rerun

   Unplug the dishwasher, or switch off its breaker if it is hard-wired, for one minute. Restore power and run the sanitize cycle again.

When to call a technician

If the light still flashes with hot water and an uninterrupted cycle, the heating system may be faulty; schedule service.

Parts that commonly cause Sanitize light flashing

• heating element
• thermistor

Order parts by your exact model number so they fit.

Other Whirlpool dishwasher codes

• F9E1Long drain (slow or no drain)
• F9E2Drain motor error
• F8E1 / H2ONo water detected
• F8E2Fill valve electrical error
• F8E4Water in the drip tray
• F8E5Fill valve stuck open
• F6E3Too many suds
• F6E4Water float switch fault
• F7E2Wash motor error
• F4E2 / F4E3Heating error
• F3E2Temperature or soil sensor fault
• F6E1Control panel or main control error
• F1E1Control board fault
• F1E2 / F2E2Control communication error
• F2E1Stuck button or console error
• FAE4 / F10E4Diverter valve error
• FAE5 / F10E5Diverter leak
• Control lock light blinks 3 timesControls are locked
• All cycle and option lights flashingCycle paused (door opened)

Frequently asked questions

What does Sanitize light flashing mean on a Whirlpool dishwasher?

The Sani light flashes when the cycle did not reach the temperature needed to sanitize. Treat that load as not sanitized. Incoming water that is too cool or opening the door during the cycle are the usual reasons.

Can I fix Whirlpool Sanitize light flashing myself?

Usually, yes. Most Sanitize light flashing problems clear with simple checks you can do at home. Start with the first step above: check the hot water.

What if Sanitize light flashing keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when Sanitize light flashing appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.