Samsung C142 error code

What it means

C142 is Mixed operation error (zones asking for heat + cool at once). The unit is stopping or limiting operation because that reading or component cannot be trusted. Manual trigger: C142 means Mixed operation error (zones asking for heat + cool at once).

Urgency

Likely causes

1. Temporary protection event that may clear after one reset
2. Airflow, power, or operating condition outside normal range
3. Sensor, wiring, or control feedback problem
4. Technician-only component fault identified by the service manual

Homeowner fix

Set every connected indoor unit to one shared mode, such as all Cool, all Heat, or all Off, without removing panels. Wait several minutes. Expected result: the mixed-operation code clears and zones resume in one mode.

When to call a pro

Call the installing contractor if all indoor units are already set to one mode and C142 still returns.

Repair vs replace

Mixed operation is normally a settings issue, not a repair-or-replace decision. Compare repair only if a technician confirms a control or communication fault.

• Samsung WindFree Premium 9,000 BTU R-32 208/230V (AR09DXDABWKN / AR09DXDABWKX)

  WindFree Premium

• Samsung WindFree Premium 12,000 BTU R-32 208/230V (AR12DXDABWKN / AR12DXDABWKX)

  WindFree Premium

• Samsung WindFree Premium 15,000 BTU R-32 208/230V (AR15DXDABWKN / AR15DXDABWKX)

  WindFree Premium

• Samsung WindFree Premium 18,000 BTU R-32 208/230V (AR18DXDABWKN / AR18DXDABWKX)

  WindFree Premium

For your technician

Technician note: verify mode priority, controller schedules, indoor addressing, and multi-zone configuration before replacing parts. 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 one hundred forty two 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.

Reset note

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

Manual trigger

C142 means Mixed operation error (zones asking for heat + cool at once).

Related codes

Source

Next step