F27
Whirlpool Dishwasher
Severity: ModerateWhat Does This Error Mean?
F27 means the diverter valve in your Whirlpool dishwasher is not reaching its expected position. The diverter valve controls which spray arm gets water — upper, lower, or both. When the valve motor cannot move the diverter to the correct position, the control board stops the cycle and shows F27. Dishes in one section of the washer will not be cleaned properly when this happens.
Affected Models
- WDT730PAHZ
- WDF520PADM
- WDT970SAHZ
- WDTA50SAHZ
- Whirlpool dishwashers with electronically controlled diverter systems
Common Causes
- Diverter valve motor has failed and cannot drive the valve to the correct position
- Foreign object (broken glass, food particle) jamming the diverter valve in place
- Worn diverter valve seal allowing the valve to slip out of position
- Position sensor on the diverter reporting incorrect valve location to the control board
- Damaged wiring or connector between the control board and the diverter motor
How to Fix It
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Run a power reset. Unplug the dishwasher for 5 minutes, then restore power and try a new cycle. A software glitch can occasionally cause F27 without a real mechanical failure.
If F27 returns immediately at the start of the next cycle, the issue is mechanical or electrical.
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Remove the lower rack, spray arm, and filter to access the bottom of the tub. Look inside the sump area for any debris, broken glass, or food particles that could be jamming the diverter valve.
Use a flashlight and feel gently around the sump opening. A small piece of broken glass or a cherry pit can easily jam the diverter.
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Try manually rotating the diverter valve if it is accessible. It should rotate between positions with moderate resistance. A stuck valve confirms a jam or mechanical failure.
Do not force the diverter. If it will not move easily, there is something blocking it or the motor has seized.
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Inspect the wiring harness connector to the diverter motor. Unplug and re-plug firmly to ensure contact. Look for corrosion or moisture in the connector.
The diverter motor connector is typically accessible from below the dishwasher after removing a lower toe panel.
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If the valve is jammed, clear the obstruction and test again. If the motor has failed mechanically, replace the diverter valve assembly. Order by model number and follow the service guide for your specific dishwasher.
After replacement, run a full cycle and listen for normal spray arm switching during the wash phase.
When to Call a Professional
The diverter valve is located in the sump assembly at the bottom of the dishwasher. Accessing it requires removing the lower rack, spray arm, and filter assembly. Diverter valve assemblies cost $30 to $80 depending on the model. A technician will charge $120 to $220 total for this repair.
Frequently Asked Questions
How does a diverter valve work in a dishwasher?
The diverter valve sits at the bottom of the tub and routes water to different spray arms. During a wash cycle, it alternates between sending water to the upper spray arm, the lower spray arm, or both. This ensures all areas of the dishwasher get equal washing coverage. A failed diverter means one section of the dishwasher will not get any water spray.
My dishes on the top rack come out dirty — is that F27?
It could be related. If the diverter is stuck routing water only to the lower spray arm, the upper rack will not get washed. However, a blocked upper spray arm or low water pressure can cause the same symptoms. Check all possibilities before assuming F27 is the cause.
Is the diverter valve a common failure on Whirlpool dishwashers?
It is not the most common failure, but it is more prone to jamming if you run the dishwasher with heavily soiled dishes that include food particles large enough to reach the sump area. Pre-rinsing very large food debris helps prevent diverter jams.