How to Fix Samsung Washer Error 9C1

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⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: 9C1 Difficulty: Hard

Problem: DC bus overvoltage on inverter circuit (>400V DC) – rectifier or capacitor fault

⚖️ Repair Decision

⚠️ CHECK WARRANTY / AGE

$100 – $250 Range

How to Fix 9C1 Error

Power cycle washer completely (unplug 10 minutes) to discharge DC bus capacitors.
If error returns immediately on power-up without motor operation: main PCB DC92-01543A faulty.
Inspect PCB for burnt components near large electrolytic capacitors (C101-C104, 450V 680μF).
Check DC bus capacitor ESR (equivalent series resistance) with ESR meter – replace PCB if >5Ω (normal <1Ω).
Verify proper grounding continuity from chassis to outlet ground (critical for voltage reference).
Replace main PCB assembly as complete unit – component-level repair not cost-effective due to integrated design.
After replacement, run full diagnostic cycle to verify DC bus stability (should maintain 310±15V DC during operation).

OEM Part #: DC92-01543A

Estimated Market Price: $195

If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

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Estimated repair cost (parts, or parts + labor) Most DIY parts are $50–$250. If you have a quote, use the total.

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EPA Section 608 Certified Technician with 18+ years experience.