What causes a mini split flashing?

A mini split flashing can be caused by flash, blink, LED, light issues. We track 100 error codes across 1 brands related to this symptom.

How do I fix a mini split flashing?

There are 200 community-ranked fixes for this symptom across 1 brands. The average fix success rate is 88%. Find your specific error code below for step-by-step instructions.

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Mini Split Flashing

Mini split LEDs blinking in an error pattern? Decode blink codes for Mitsubishi, Daikin, Fujitsu, LG, and other ductless systems.

100

Error Codes

Brands

200

DIY Fixes

88%

Avg Success

Mitsubishi

100 codes

All Mitsubishi codes

M-NET Communication Line Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Test M-NET Communication Bus Wiring and Replace Faulty Components

Indoor-to-Indoor Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Faulty Indoor Unit Communication Board

Main/Sub Remote Controller Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Replace Remote Controller Communication Interface Board

Outdoor-to-Outdoor Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 88% success

Replace Outdoor Unit Communication Interface Board

Indoor-to-Outdoor Serial Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Indoor Unit Communication Board

Indoor/Outdoor Unit Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Test Signal Wire Voltage and Replace Damaged Wiring or PCB

Inter-Outdoor-Unit Transmission Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Damaged Inter-Unit Communication Wiring

Power Supply Phase / Momentary Power Failure

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Install Dedicated Circuit and Surge Protector

Pipe Temperature Sensor (TC3) Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Pipe Temperature Sensor (TC3)

Sub-Cool Pipe Temperature Sensor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Sub-Cool Pipe Temperature Sensor (TC2)

Indoor Coil Freeze or Overheating Protection

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Inspect and Clean Blower Wheel; Check Fan Motor Operation

Drain Pump Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Replace the Condensate Drain Pump Assembly

Drain Sensor / Float Switch Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Flush and Repair the Drain Line and Replace Float Switch if Needed

Discharge Air Temperature Sensor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace the Discharge Air Temperature Thermistor Sensor

Indoor Pipe/Coil Temperature Sensor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 88% success

Test and Replace Indoor Coil Temperature Thermistor Sensor

Intake Air Temperature Sensor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Test and Replace Intake Air Temperature Thermistor

Indoor Interlock / Self-Diagnosis Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Inspect and Replace Indoor PCB to Fix Self-Diagnosis Fault

Centralized Controller Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Repair M-NET Bus Wiring and Replace Indoor Unit PCB if Needed

Indoor Vane/Louver Motor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Replace Vane Motor Assembly

Indoor Unit Address / Connector Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Inspect and Repair Indoor PCB Connectors or Replace PCB

Indoor/Outdoor Serial Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Replace Damaged Communication Wiring and Terminals

Indoor Unit Overcurrent Protection

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace the Fan Motor if Windings are Faulty

Indoor Fan Motor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test Motor Windings and Replace Indoor Fan Motor

Indoor Unit EEPROM Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Reflash or Replace Indoor Unit Control Board

Indoor/Outdoor Communication Error (Legacy)

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Test and Replace Communication Cable or Terminal Blocks

Indoor Unit PCB Processor Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Replace the Indoor Unit PCB Control Board

Remote Controller Communication Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Check and Repair Wired Remote Controller Cable Connections

Remote Controller Signal Receiving Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 90% success

Replace the Indoor Unit IR Receiver Module

Remote Controller PCB Error

❄️ SLZ-KF09NA 9,000 BTU 4-Way Ceiling Cassette Indoor Unit· 2 fixes· 85% success

Test and Replace Remote Controller PCB or Communication Cable

M-NET Communication Line Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Test M-NET Communication Bus Wiring and Replace Faulty Components

Indoor-to-Indoor Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Faulty Indoor Unit Communication Board

Main/Sub Remote Controller Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Replace Remote Controller Communication Interface Board

Outdoor-to-Outdoor Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 88% success

Replace Outdoor Unit Communication Interface Board

Indoor-to-Outdoor Serial Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Indoor Unit Communication Board

Indoor/Outdoor Unit Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Test Signal Wire Voltage and Replace Damaged Wiring or PCB

Inter-Outdoor-Unit Transmission Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Damaged Inter-Unit Communication Wiring

Power Supply Phase / Momentary Power Failure

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Install Dedicated Circuit and Surge Protector

Pipe Temperature Sensor (TC3) Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Pipe Temperature Sensor (TC3)

Sub-Cool Pipe Temperature Sensor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Sub-Cool Pipe Temperature Sensor (TC2)

Indoor Coil Freeze or Overheating Protection

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Inspect and Clean Blower Wheel; Check Fan Motor Operation

Drain Pump Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Replace the Condensate Drain Pump Assembly

Drain Sensor / Float Switch Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Flush and Repair the Drain Line and Replace Float Switch if Needed

Discharge Air Temperature Sensor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace the Discharge Air Temperature Thermistor Sensor

Indoor Pipe/Coil Temperature Sensor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 88% success

Test and Replace Indoor Coil Temperature Thermistor Sensor

Intake Air Temperature Sensor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Test and Replace Intake Air Temperature Thermistor

Indoor Interlock / Self-Diagnosis Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Inspect and Replace Indoor PCB to Fix Self-Diagnosis Fault

Centralized Controller Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Repair M-NET Bus Wiring and Replace Indoor Unit PCB if Needed

Indoor Vane/Louver Motor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Replace Vane Motor Assembly

Indoor Unit Address / Connector Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Inspect and Repair Indoor PCB Connectors or Replace PCB

Indoor/Outdoor Serial Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Replace Damaged Communication Wiring and Terminals

Indoor Unit Overcurrent Protection

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace the Fan Motor if Windings are Faulty

Indoor Fan Motor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test Motor Windings and Replace Indoor Fan Motor

Indoor Unit EEPROM Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Reflash or Replace Indoor Unit Control Board

Indoor/Outdoor Communication Error (Legacy)

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Test and Replace Communication Cable or Terminal Blocks

Indoor Unit PCB Processor Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Replace the Indoor Unit PCB Control Board

Remote Controller Communication Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Check and Repair Wired Remote Controller Cable Connections

Remote Controller Signal Receiving Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 90% success

Replace the Indoor Unit IR Receiver Module

Remote Controller PCB Error

❄️ SVZ-KP18NA 18,000 BTU Multi-Position Ducted Air Handler· 2 fixes· 85% success

Test and Replace Remote Controller PCB or Communication Cable

M-NET Communication Line Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Test M-NET Communication Bus Wiring and Replace Faulty Components

Indoor-to-Indoor Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Faulty Indoor Unit Communication Board

Main/Sub Remote Controller Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Replace Remote Controller Communication Interface Board

Outdoor-to-Outdoor Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 88% success

Replace Outdoor Unit Communication Interface Board

Indoor-to-Outdoor Serial Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Indoor Unit Communication Board

Indoor/Outdoor Unit Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Test Signal Wire Voltage and Replace Damaged Wiring or PCB

Inter-Outdoor-Unit Transmission Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Damaged Inter-Unit Communication Wiring

Power Supply Phase / Momentary Power Failure

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Install Dedicated Circuit and Surge Protector

Pipe Temperature Sensor (TC3) Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Pipe Temperature Sensor (TC3)

Sub-Cool Pipe Temperature Sensor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Sub-Cool Pipe Temperature Sensor (TC2)

Indoor Coil Freeze or Overheating Protection

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Inspect and Clean Blower Wheel; Check Fan Motor Operation

Drain Pump Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Replace the Condensate Drain Pump Assembly

Drain Sensor / Float Switch Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Flush and Repair the Drain Line and Replace Float Switch if Needed

Discharge Air Temperature Sensor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace the Discharge Air Temperature Thermistor Sensor

Indoor Pipe/Coil Temperature Sensor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 88% success

Test and Replace Indoor Coil Temperature Thermistor Sensor

Intake Air Temperature Sensor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Test and Replace Intake Air Temperature Thermistor

Indoor Interlock / Self-Diagnosis Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Inspect and Replace Indoor PCB to Fix Self-Diagnosis Fault

Centralized Controller Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Repair M-NET Bus Wiring and Replace Indoor Unit PCB if Needed

Indoor Vane/Louver Motor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Replace Vane Motor Assembly

Indoor Unit Address / Connector Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Inspect and Repair Indoor PCB Connectors or Replace PCB

Indoor/Outdoor Serial Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Replace Damaged Communication Wiring and Terminals

Indoor Unit Overcurrent Protection

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace the Fan Motor if Windings are Faulty

Indoor Fan Motor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test Motor Windings and Replace Indoor Fan Motor

Indoor Unit EEPROM Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Reflash or Replace Indoor Unit Control Board

Indoor/Outdoor Communication Error (Legacy)

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Test and Replace Communication Cable or Terminal Blocks

Indoor Unit PCB Processor Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Replace the Indoor Unit PCB Control Board

Remote Controller Communication Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Check and Repair Wired Remote Controller Cable Connections

Remote Controller Signal Receiving Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 90% success

Replace the Indoor Unit IR Receiver Module

Remote Controller PCB Error

❄️ SEZ-KD12NA 12,000 BTU Ceiling-Concealed Ducted Indoor Unit· 2 fixes· 85% success

Test and Replace Remote Controller PCB or Communication Cable

M-NET Communication Line Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 85% success

Test M-NET Communication Bus Wiring and Replace Faulty Components

Indoor-to-Indoor Communication Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Test and Replace Faulty Indoor Unit Communication Board

Main/Sub Remote Controller Communication Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 85% success

Replace Remote Controller Communication Interface Board

Outdoor-to-Outdoor Communication Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 88% success

Replace Outdoor Unit Communication Interface Board

Indoor-to-Outdoor Serial Communication Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Test and Replace Indoor Unit Communication Board

Indoor/Outdoor Unit Communication Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 85% success

Test Signal Wire Voltage and Replace Damaged Wiring or PCB

Inter-Outdoor-Unit Transmission Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Test and Replace Damaged Inter-Unit Communication Wiring

Power Supply Phase / Momentary Power Failure

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Install Dedicated Circuit and Surge Protector

Pipe Temperature Sensor (TC3) Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Test and Replace Pipe Temperature Sensor (TC3)

Sub-Cool Pipe Temperature Sensor Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Test and Replace Sub-Cool Pipe Temperature Sensor (TC2)

Indoor Coil Freeze or Overheating Protection

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 85% success

Inspect and Clean Blower Wheel; Check Fan Motor Operation

Drain Pump Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Replace the Condensate Drain Pump Assembly

Drain Sensor / Float Switch Error

❄️ MSZ-GL12NA 12,000 BTU Wall-Mount Ductless Mini-Split Indoor Unit· 2 fixes· 90% success

Flush and Repair the Drain Line and Replace Float Switch if Needed

Related Symptoms

❄️AC Not Cooling 💧Mini Split Leaking 💡HVAC Blinking Lights

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