Whirlpool washer F4E3: main heater not turning on
F4E3 means the control commanded the main heater on, but the heater did not turn on.
What F4E3 means
- Brand
- Whirlpool
- Appliance
- Front-load washer
- Code
- F4E3
- Documented meaning
- Main heater not turning on
- Applies to
- 8 Whirlpool models on 1 platform
- Can you keep using it?
- With caution
What the washer is detecting
The control switches the heater through a relay and checks the result. When the heater stays off, it stores F4E3.
Causes listed for this condition
In the order the service documentation checks them. Documented causes come from the manufacturer's service documentation for these platforms; possible causes are based on how the system works; unconfirmed marks common assumptions that the documentation does not support.
- Documented A heater relay on the main control that stays open.
- Possible An open heating element or a loose connection to it.
Safe checks you can make
- Unplug the washer (or switch off its breaker) for one minute, then restore power and start a new cycle to see whether the code comes back. A code that returns right away points to a fault that needs diagnosis.
- Run a cold-water cycle to see whether the washer otherwise works.
This stage requires professional testing. Full diagnosis involves hazards such as live line voltage, gas, a sealed refrigerant system or microwave high voltage. Do not attempt it yourself.
What a technician checks
- Checks the heating element and the relay output. This requires professional testing because line voltage is present.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Washer main control board replacement | $300–$720 | Moderate |
Typical total ranges for the Las Vegas area, parts and labor included. The final cost depends on diagnosis, the exact model, parts availability and whether other damage is found.
Can you keep using it?
Use with caution. Cold cycles can usually be used; heated cycles will not heat until repaired.
Whirlpool models documented with this code
Related problems and codes
Other codes documented on the same Whirlpool platforms:
Repair or replace?
A fault code alone rarely justifies replacing a washer. Most F4E3 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 10–13-year life and the diagnosed repair is a major one. See the repair-or-replace guide.
Need F4E3 diagnosed in the Las Vegas area?
We repair Whirlpool, Maytag, KitchenAid, JennAir, Amana and other Whirlpool-family appliances in Las Vegas, Henderson, Summerlin and Boulder City. A model number helps but is never required to book.