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Samsung C574 error code

C574 is EEV or valve close error (self-diagnosis). The unit is stopping or limiting operation because that reading or component cannot be trusted. Manual trigger: C574 means EEV or valve close error (self-diagnosis).

All Codes
Urgency
advisory
Verified
Jul 30, 2026
Fix path
Technician

What it means

C574 is EEV or valve close error (self-diagnosis). The unit is stopping or limiting operation because that reading or component cannot be trusted. Manual trigger: C574 means EEV or valve close error (self-diagnosis).

Urgency

advisory

This is not usually an immediate safety hazard, but do not keep resetting it. Try only the safe homeowner check below; if the same code returns, schedule service.

Likely causes

  1. Dirty filters, blocked coil airflow, or an outdoor clearance problem increasing pressure or temperature
  2. Low charge, overcharge, leak, or refrigerant-flow restriction
  3. Discharge, pressure, or refrigerant sensor reading outside range
  4. Compressor, valve, or outdoor board issue after airflow and charge are verified

Homeowner fix

Turn the system off and do not open service valves, connect gauges, or add refrigerant. Reset once only if safe; if C574 returns, leave the system off for service.

When to call a pro

Call a licensed HVAC technician if C574 appears or returns after one reset. Tell them the code means EEV or valve close error.

This code points to refrigerant or sealed-system and compressor work - get repair quotes from contractors in your area.

Get repair quotes

Repair vs replace

A closed service valve or connector problem may be modest; EEV replacement or refrigerant-circuit work can be costly. Compare major confirmed repairs with replacement on older equipment.

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Your Samsung model

WindFree Premium model pages in the Samsung catalog help compare this repair path with current replacement options.

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For your technician

Technician note: verify service-valve position, EEV coil/drive, pressure behavior, restrictions, refrigerant condition, and outdoor PBA output. Page context: Samsung maps this display to the WindFree Premium line; source: Samsung WindFree Premium R-32 Service Manual; display convention: match the letter C and five hundred seventy four marker exactly before comparing neighboring codes.

Which systems show it

  • Samsung R-32 residential ductless diagnostics anchored to WindFree Premium and used as common Samsung C-code homeowner guidance for current R-32 residential mini-split coverage.

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Your mini split is showing a refrigerant leak codeMini split leaking waterMini split indoor unit freezing up

Reset note

Power cycle once only if the homeowner fix says it is safe; do not keep resetting a returning code.

Manual trigger

C574 means EEV or valve close error (self-diagnosis).

Related codes

C554 Technician pathDEFROST Not an error pathC500 diagnosticsDRY MODE FANCC diagnostics

Source

Samsung WindFree Premium R-32 Service Manual
Section
Section 9 troubleshooting index, outdoor error list
Page
Section 9 troubleshooting index

Short quote: "EEV or valve close error (self-diagnosis)"

Sourced Jul 2026

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