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Whirlpool Washer F4E0 — Heater Not Detected

Editorial & technical review
  • Written by ApplianceWorth Editorial Team
  • Technically reviewed by Victor — appliance technician
  • Last reviewed 2026-07-01
  • Applies to Whirlpool washers
  • Confidence medium
  • Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction

What this code means

The expected water-temperature rise was not detected.

Most likely causes

  • Low incoming hot-water temperature
  • Open heater on equipped models
  • Temperature sensor, wiring or control fault

Safe checks for the owner

  1. Confirm hot and cold hoses are connected correctly.
  2. Avoid sanitize or steam cycles until diagnosed.

Estimated U.S. repair cost

$220–$550, depending on model, access, parts availability and local labor.