Dishwasher Diverter and Spray System Error Guide

Modern dishwashers often use diverter valves or distribution motors to direct water between spray zones. If the mechanism jams or the control board cannot detect movement, the appliance may stop with a spray system or motor-related error.

Spray Faults Can Start With Debris

A diverter error does not always mean the motor has failed. Food debris, broken glass, loose labels, or displaced rack items can block spray movement or jam the sump area.

Common causes

  • Blocked spray arm
  • Debris in the sump
  • Jammed diverter valve
  • Failed distribution motor
  • Wiring fault
  • Control board issue

Safe first checks

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Safety warning

Stop using the dishwasher if it leaks, smells hot, or makes a harsh grinding noise from underneath.

When to stop and call a professional

Call a professional if cleaning filters and spray arms does not clear the fault, or if the error points to a diverter motor, wiring, or control-board failure.

How this information is researched

Publisher: Error Code Lookup Editorial Team. Error Code Lookup is an independent appliance-information resource and is not affiliated with appliance manufacturers. Guidance is written in our own words and reviewed with safety boundaries in mind.

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Frequently asked questions

Can a blocked spray arm cause a diverter code?

Yes. If water cannot move through the expected spray path, some machines detect the distribution fault and stop.

Is a diverter valve repair DIY-friendly?

Usually no. Diverter motors and valves often sit underneath the tub and require safe electrical isolation and leak testing.

Why does the dishwasher wash one rack badly?

Poor cleaning on one rack can be caused by a blocked spray arm, weak pump pressure, or a diverter that is not sending water to that zone.