- Appliances
- Washing machines
9C
Samsung washer 9C or UC: supply voltage fault
Evidence linked to this decision
View source: Samsung US washing machine information and error codesRisk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
9C or UC means the washer detected an abnormal or unstable electrical supply. Stop using extensions and retry only after household power is stable.
Safety first
Stop and check this first
- Do not use an extension, bypass a breaker or reconnect a hot or damaged plug. Stop for arcing, smoke, burning odour or repeated trips.
Safe checks you can perform
- Check the household supply from outside the washer
- Inspect only the plug, cord and outlet
- Retry once without extensions
Leave these tasks to a qualified professional
- Do not attempt this professional task: Separate installation and appliance power faults
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Separate installation and appliance power faults
What they doA qualified electrician or appliance technician should test the circuit, outlet, cord, input filter and control safely under model specifications.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Check the household supply from outside the washer
Confirm whether lights or other circuits are unstable and whether the dedicated breaker remains in its normal operating position.
Do not use an extension, bypass a breaker or reconnect a hot or damaged plug. Stop for arcing, smoke, burning odour or repeated trips.
Evidence: Samsung US washing machine information and error codes
Inspect only the plug, cord and outlet
With power isolated, look for heat, discoloration or physical damage without opening the plug, outlet or appliance covers.
Do not use an extension, bypass a breaker or reconnect a hot or damaged plug. Stop for arcing, smoke, burning odour or repeated trips.
Evidence: Samsung US washing machine information and error codes
Retry once without extensions
Connect only to the normal dedicated outlet after stable power returns and try once; stop if 9C, UC or a breaker trip repeats.
Do not use an extension, bypass a breaker or reconnect a hot or damaged plug. Stop for arcing, smoke, burning odour or repeated trips.
Evidence: Samsung US washing machine information and error codes
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Virtual technician
Does 9C still appear after these checks?
This guided flow uses the exact code and your answers to choose a test, an expected result and the next branch.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Samsung
- Product type
- Washing machines
Known code variants
- 9C1
- 9C2
- 9E1
- 9E2
- code erreur 9C lave-linge Samsung
- codice 9C Samsung
- código 9C Samsung
- erreur 9C Samsung
- error 9C lavadora Samsung
- errore 9C lavatrice Samsung
- Fehlercode 9C Samsung
- Samsung 9C
- Samsung Waschmaschine Fehler 9C
- Samsung washer 9C
- Samsung washing machine code 9C
- UC
What it means
Samsung groups UC, 9C and numbered 9C/9E variants with low, high or irregular supply conditions; some suffixes identify hardware or software overcurrent. The model manual controls the exact branch.
Warnings and stop conditions
- Highsource verified
Do not use an extension, bypass a breaker or reconnect a hot or damaged plug. Stop for arcing, smoke, burning odour or repeated trips.
Evidence: Samsung US washing machine information and error codes
Symptoms and causes
Probable causes · in order
- Household voltage or connection is unstableConfirmed
An outage, weak circuit, loose outlet, overloaded adaptor or voltage fluctuation can push the supply outside the accepted range.
Evidence: Samsung US washing machine information and error codes
- The washer power input or control reports an abnormal loadPossible
A cord, filter, power module or internal control fault can also trigger supply or overcurrent protection.
Evidence: Samsung US washing machine information and error codes
Sources and technical references
- 1
Samsung US washing machine information and error codes
Samsung Electronics · 2026 · official_doc
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