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Error code reference

Dacor Range Oven Cooktop Error Code FA

Third Gen Dishwasher: Turbidity sensor fault (L1 and L5 flash)

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Third Gen Dishwasher: Turbidity sensor fault (L1 and L5 flash) - machine assumes high turbidity in auto program.

First step from the service manual

Check water quality, filters, turbidity sensor and drain system.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What FA means on a Dacor range oven cooktop

The FA error code on Dacor third-generation dishwashers indicates a turbidity sensor fault. The turbidity sensor monitors the clarity of the wash water, detecting how much soil and particulate matter is suspended in the water at various points during the wash cycle. When the control board cannot receive a valid signal from this sensor, or the sensor reads an abnormally high turbidity value, the FA code is triggered. Indicator lights L1 and L5 will flash simultaneously to alert the user to this condition.

When the FA fault is active, the machine defaults to operating as though the water has extremely high turbidity. In an auto wash program, this means the dishwasher may run extended cycles, use more water, or otherwise compensate for what it interprets as heavily soiled wash water. This default behavior protects dish cleaning performance but is not efficient for lightly or normally soiled loads.

Common root causes include hard water mineral deposits or film buildup on the turbidity sensor's optical or electronic sensing element, clogged or dirty filters restricting proper water flow past the sensor, a malfunctioning or failed sensor component, and drain system issues that leave residual soiled water in the sump. Water quality itself can be a contributing factor, as very high mineral content or detergent residue can interfere with accurate sensor readings. Systematic inspection of the filters, drain path, sensor mounting, and water supply conditions is the recommended starting point for diagnosis.

Source: manufacturer service documentation.

Common causes of FA

  1. 01

    Turbidity sensor contamination or buildup

    Wiring / connection

    Mineral scale, grease, or detergent residue can coat the turbidity sensor's sensing surface, causing inaccurate readings or complete sensor failure. Inspect the sensor for visible deposits and clean it carefully according to the component's specifications.

  2. 02

    Clogged or dirty filters

    Wiring / connection

    Blocked filters restrict water circulation and can prevent the sensor from sampling water correctly, leading to false fault readings. Remove and clean all filter components thoroughly and check for debris accumulation.

  3. 03

    Drain system obstruction

    Wiring / connection

    A partially blocked drain can leave heavily soiled water sitting in the sump, causing the sensor to continuously read high turbidity. Inspect the drain hose, drain pump, and sump for clogs or standing water.

  4. 04

    Poor water quality

    Wiring / connection

    Extremely hard water or water with high particulate content can overwhelm the sensor's normal operating range and trigger the FA fault. Running a water quality test and evaluating whether a water softener or filtration solution is appropriate can help identify this cause.

  5. 05

    Failed turbidity sensor

    Part replacement

    If cleaning and inspecting all related systems does not resolve the fault, the turbidity sensor itself may have failed electronically. A faulty sensor will need to be replaced to restore proper auto-program operation.

See the test procedure for each cause

Frequently asked questions about FA

What does FA mean on a Dacor range, oven, cooktop?
The FA code actually appears on Dacor third-generation dishwashers, not on ranges, ovens, or cooktops. It signals a turbidity sensor fault, indicated by L1 and L5 flashing at the same time. The turbidity sensor monitors wash water clarity, and when it malfunctions or cannot get a valid reading, the machine defaults to assuming the water is heavily soiled. This can cause the dishwasher to run longer or less efficiently than usual.
How do I fix the FA error code on my Dacor dishwasher?
Start by cleaning all filters and checking the drain system for blockages, as these are the most common and easiest issues to address. Next, locate the turbidity sensor and inspect it for mineral scale, grease, or detergent buildup, and clean the sensing surface carefully. If those steps do not clear the fault, evaluate your home's water quality for very high hardness or particulate levels. If the sensor itself has failed, it will need to be replaced by a qualified technician.
Is the FA error code on a Dacor dishwasher a safety concern?
The FA code does not indicate a safety hazard. It is a functional fault related to the water clarity sensing system. The dishwasher will continue to operate but will assume maximum turbidity, which means cycles may run longer or use more water than necessary. It is best to diagnose and repair the issue to restore efficient operation, but the condition is not dangerous.
Will resetting my Dacor dishwasher clear the FA error code?
A power reset may temporarily clear the FA code display, but if the underlying problem with the turbidity sensor, filters, drain system, or water quality is not addressed, the fault will return. Resetting the unit is useful for confirming whether the fault is intermittent, but it is not a substitute for proper diagnosis and repair.
How much does it cost to repair the FA error on a Dacor dishwasher?
Repair costs depend on what is causing the fault. If the issue is simply clogged filters or sensor contamination, you may be able to resolve it yourself at little to no cost beyond cleaning supplies. If the turbidity sensor needs to be replaced, parts and labor costs can range from around $100 to $300 or more, depending on your location and the service provider. Getting a diagnostic estimate from an authorized technician is the best way to confirm the total repair cost.

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