Samsung Dishwasher Error Code PC — Zone Wash Function Error
What this means
Error code PC indicates a malfunction with the dishwasher's Zone Wash feature, which directs water pressure to specific rack zones for targeted cleaning. The error typically means the water distribution mechanism or the zone wash motor is not responding to commands from the control board. This can be caused by a stuck zone wash valve, a clogged spray arm, or a control board communication issue.
Step-by-step fix
4 stepsPower cycle the dishwasher
Turn off the dishwasher at the circuit breaker for 60 seconds, then turn it back on. This resets the control board and may clear a temporary glitch in the zone wash system.
A simple power cycle resolves this error in many cases.
Inspect and clean the spray arms
Remove the upper and lower spray arms by twisting or unclipping them. Check all spray nozzles for food debris or mineral buildup. Use a toothpick to clear any blocked holes.
Soak spray arms in warm vinegar water for 30 minutes to dissolve mineral deposits.
Check the zone wash diverter valve
The zone wash system uses a diverter valve to direct water flow between racks. Inspect this valve (usually located near the sump area) for obstructions or signs of mechanical failure.
The diverter valve should move freely — if it feels stuck or gritty, it may need cleaning or replacement.
Run a test cycle without Zone Wash
Try running a normal wash cycle without the Zone Wash option selected. If the dishwasher runs normally without the PC error, the issue is isolated to the zone wash components.
If the error only appears when Zone Wash is activated, the diverter motor or valve likely needs replacement.
When to call a professional
If the PC error persists after cleaning and power cycling, the zone wash diverter motor or main control board may need professional diagnosis and replacement.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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