Whirlpool · Dishwasher Minor

F6E6 — Incoming Water Too Cold

The thermistor reports incoming water below ~110°F. The dishwasher needs ~120°F at the inlet for proper detergent activation and cleaning.

Keep using it?
Yes — fix when convenient
DIY difficulty
Easy
Checked against
applianceaid.com ↗ community repair site, not a manufacturer document

How to fix it

  1. Run hot water at the kitchen sink until it runs hot, then start the dishwasher.
  2. Set the household water heater to 120°F.
  3. Enable the Hi-Temp or Sani-Rinse option to let the dishwasher boost water temperature.
  4. If F6E6 persists with verified hot water at the inlet, test the thermistor per the tech sheet and replace the OWI/thermistor if out of spec.

Why it happens

Typical signs: F6E6 on display · Long cycle times as dishwasher tries to heat water · Poor cleaning / cloudy glasses

  • Water heater set too low or too far away Heater set under 120°F, or kitchen is far from heater so hot water cools in the pipe.
  • Did not pre-run hot water at the sink First fill is cold water sitting in the pipe.
  • Failed thermistor reading low Less common; verify hot water actually reaches the dishwasher first.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Whirlpool Dishwasher Inlet Water Thermistor (OWI Sensor) Common replacement
    Amazon →

Related repair guides

Dishwasher Leaving White Film or Spots on Dishes →Dishwasher Not Cleaning Dishes Well — How to Fix It →Dishwasher Soap Door Not Opening / Detergent Left Behind →

More Whirlpool dishwasher codes

F1E1 F1E1 — Control Module Fault F1E2 F1E2 — Incompatible or Failed Control Board F2 F2 — Water leak detected F3E1 F3E1 — Thermistor/OWI Sensor Open F3E3 F3E3 — OWI Calibration Failure / Bad Check Valve F4E3 F4E3 — Heating Error

All Whirlpool codes → All dishwasher codes →

Frequently asked questions

What does the F6E6 code mean on a Whirlpool dishwasher?

The thermistor reports incoming water below ~110°F. The dishwasher needs ~120°F at the inlet for proper detergent activation and cleaning.

What causes the F6E6 code on a Whirlpool dishwasher?

Water heater set too low or too far away: Heater set under 120°F, or kitchen is far from heater so hot water cools in the pipe. Did not pre-run hot water at the sink: First fill is cold water sitting in the pipe. Failed thermistor reading low: Less common; verify hot water actually reaches the dishwasher first.

Is it safe to keep using a Whirlpool dishwasher with a F6E6 error?

Yes — fix when convenient. This is rated a minor-severity fault.

How do I fix F6E6 on a Whirlpool dishwasher?

Run hot water at the kitchen sink until it runs hot, then start the dishwasher. Set the household water heater to 120°F. Enable the Hi-Temp or Sani-Rinse option to let the dishwasher boost water temperature.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. How we verify: applianceaid.com — community repair site, not a manufacturer document.