Viking Dishwasher Turbidity Sensor Fault
Viking Professional dishwashers equipped with automatic soil sensing use a turbidity sensor (optical sensor) in the sump area to measure how dirty the wash water is. The control board uses this data to automatically adjust cycle intensity, number of rinses, and cycle duration for optimal cleaning efficiency. When the turbidity sensor fails, the dishwasher reverts to a fixed default cycle regardless of actual soil level — resulting in over-washing lightly soiled loads or under-washing heavily soiled loads. A dirty or coated sensor lens is the most common cause of turbidity sensor errors, making cleaning a first diagnostic step before component replacement.
What Causes the Turbidity Sensor Fault Error?
Hard water mineral deposits, grease film, or detergent residue on the optical sensor lens cause false turbidity readings. Regular cleaning with a dishwasher cleaner tablet resolves this in many cases.
The LED emitter or photodetector in the turbidity sensor has failed, preventing the sensor from generating a valid turbidity signal.
The control board sensor input circuit has developed a fault, unable to process the turbidity signal correctly.
Basic Steps Before Calling a Technician
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01Run a Cleaning Cycle
Place a dishwasher cleaning tablet (such as Affresh) in the bottom rack and run a hot wash cycle with the dishwasher empty. This dissolves mineral deposits that may be coating the turbidity sensor lens.
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02Clean the Filter Assembly
A clogged filter can cause false soil readings. Remove, rinse, and reinstall the filter per the owner's manual cleaning procedure.
When to Call a Technician
If cleaning cycles do not resolve the turbidity sensor fault, professional sensor diagnosis and replacement is required.
Book a Technician →Estimated range for parts and labor. Your technician provides an exact upfront quote before any work begins. Diagnostic fee is applied toward the repair cost.
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Other Viking Dishwasher Error Codes
Viking Turbidity Sensor Fault Error Code — Frequently Asked Questions
Common questions about Viking appliance repair answered by our certified technicians.
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Most Viking Professional Series dishwashers are equipped with a turbidity sensor for automatic soil sensing. Entry-level models may use a simpler fixed cycle approach. Consult your owner's manual or model specification sheet to confirm whether your model includes automatic soil sensing.
Fix Your Viking Turbidity Sensor Fault Error Code Today
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