JennAir dishwasher F4E3: heater: relay shorted or heater failed
F4E3 means the control found the heater relay shorted or the heating element shorted to ground.
What F4E3 means
- Brand
- JennAir
- Appliance
- Dishwasher
- Code
- F4E3
- Documented meaning
- Heater: relay shorted or heater failed
- Applies to
- 3 JennAir models on 1 platform
- Can you keep using it?
- No — stop and have it checked
What the dishwasher is detecting
The control monitors the heater circuit for current when the heater should be off and for leakage to ground. Either condition sets this code; cycles continue without heat.
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 shorted heater relay on the main control.
- Documented A heating element shorted to ground.
Safe checks you can make
- If you notice a burning smell, melted plastic, or a breaker or GFCI that trips during cycles, switch off the dishwasher's breaker and leave it off.
Further diagnosis requires opening the appliance. Beyond the owner checks, diagnosis involves removing panels, testing components and checking wiring. We describe what a technician investigates, not how to do it yourself.
What a technician checks
- Inspects the heater and its connections for overheating or shorts.
- Checks the heating and heated-dry circuit with power off.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Dishwasher heating element or drying fan replacement | $190–$410 | Moderate |
| Dishwasher main control board replacement | $260–$590 | 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?
Stop using it until it is checked. Stop using the dishwasher and schedule service. A shorted heater or relay is an electrical and overheating risk.
JennAir models documented with this code
Related problems and codes
Other codes documented on the same JennAir platforms:
Repair or replace?
A fault code alone rarely justifies replacing a dishwasher. Most F4E3 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 9–12-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.