F15
Whirlpool Dishwasher
Severity: CriticalWhat Does This Error Mean?
The F15 error on your Whirlpool dishwasher indicates a communication failure between the main control board and another module in the machine. This is a more serious electronic error — it means the control system has detected that internal communication has broken down. The dishwasher will stop and refuse to run until the fault is resolved.
Affected Models
- Whirlpool WDF series
- Whirlpool WDT series
- Whirlpool 6th Sense series
- Most Whirlpool dishwashers with digital controls
Common Causes
- A power surge or sudden power outage has disrupted the control board communication
- One of the wiring harness connectors between the boards has worked loose
- The main control board has failed
- A secondary module (such as the motor control board or display board) has failed
- Water or moisture has entered the control board area and caused a fault
How to Fix It
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Unplug the dishwasher from the wall socket for five full minutes.
This performs a full power reset. A control board reset resolves F15 in some cases when caused by a temporary power issue.
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Plug it back in and try starting a short cycle. If F15 clears and the machine operates normally, watch it for the next few cycles.
If F15 returns after a few cycles, a board has likely suffered damage.
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Check that the dishwasher is plugged directly into a wall outlet and that the outlet is protected by a surge protector.
Power surges are a leading cause of control board failures in all appliances.
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Look under the door panel for any visible signs of moisture or water damage near the control board area.
A leaking door seal can allow steam or water to reach the electronics — check the door gasket for damage.
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If the reset does not clear F15, contact an appliance technician. A board test will identify which module has failed.
Do not purchase parts without a proper diagnosis — boards are expensive and non-returnable once installed.
When to Call a Professional
F15 almost always requires a technician. Before replacing any boards, a professional should diagnose which component has failed. Control board replacement costs $120–$300 for parts alone, plus $80–$150 labor. Get a diagnosis first to avoid replacing the wrong board.
Frequently Asked Questions
Can a power outage cause F15?
Yes — sudden power cuts or surges during a running cycle can corrupt communication between the control boards. Always try a full power reset first. If F15 persists, the power event may have permanently damaged a board.
Is it worth repairing a Whirlpool dishwasher with F15?
If the machine is under 8 years old, a board replacement is usually worth it. If it is older and close to end of life, consider whether the repair cost (often $200–$400 total) is worth it versus buying new.
Will F15 damage my dishes or plumbing if I ignore it?
No — the machine will simply refuse to start or will stop mid-cycle. Ignoring it will not cause damage beyond the cycle not completing. However, the dishwasher will remain non-functional until repaired.