Washer shows F07 or F7, may not heat water or may stop mid-cycle, sometimes associated with F03 on some models.

Safety first: Unplug the washer and shut off water. Heating components can remain hot after use; allow time to cool.

Step-by-step:

• Access heater: On many Whirlpool front-loaders, the heater is mounted at the bottom of the tub, accessible from the rear panel.
• Inspect wiring: Check the heater terminals and wiring harness for burn marks, loose connections, or melted insulation.
• Test heater resistance: Disconnect the heater wires and measure resistance across the heater terminals. Typical values are 10–30 ohms (check your tech sheet). An open circuit indicates a failed heater.
• Check for ground fault: Measure resistance from each heater terminal to chassis ground. Any measurable continuity indicates a shorted heater that must be replaced.
• Control board inspection: If the heater tests good, inspect the main control board for signs of a stuck or burnt heater relay. A relay welded closed can cause overheating and F07.
• Replace faulty parts: Replace the heater if open or shorted. If the heater and wiring are good but F07 persists, the main control board likely needs replacement.

When to call a technician: If you suspect a control board relay issue or are not comfortable testing for ground faults, professional service is recommended.