What to do if my Samsung AC036BXADCH Air Conditioner shows E403 error?
- AAndrew GonzalezSep 13, 2025
If your Samsung Air Conditioner is showing the E403 error, check the outdoor condenser.

What to do if my Samsung AC036BXADCH Air Conditioner shows E403 error?
If your Samsung Air Conditioner is showing the E403 error, check the outdoor condenser.
| Brand | Samsung |
|---|---|
| Model | AC036BXADCH |
| Category | Air Conditioner |
| Language | English |
General safety precautions to prevent electric shock and fire hazards.
Safety measures for handling refrigerants to prevent environmental and personal harm.
Procedure for disassembling and reassembling the indoor unit.
Disassembly and reassembly procedure for 1way CST AC018BN1DCH indoor unit.
Procedure for disassembling electrical equipment parts from the indoor unit.
Procedure for disassembling the heat exchanger.
Disassembly procedure for the panel of the 4way CST indoor unit.
Disassembly procedure for the panel of the 4way CST (600x600) indoor unit.
Procedure for disassembling the evaporator.
Disassembly procedure for the panel of the 360 Cassette indoor unit.
Procedure for disassembling the right front cabinet of outdoor units.
Procedure for purging refrigerant and separating the heat exchanger.
Procedure for discharging refrigerant and separating the 4-way valve.
Procedure for removing the compressor and its felt cover.
Procedure for disassembling the right front cabinet of outdoor units.
Procedure for disassembling the rear right cabinet and sensor.
Procedure for disassembling the left front cabinet of outdoor units.
Steps to set indoor unit address and installation options using the remote.
Setting functional options for indoor units based on installation location.
Steps to set the address for each indoor unit using the remote control.
Explanation and setup procedure for the Emergency Temperature Output (ETO) function.
Self-diagnosis function for installation status and product integrity.
List of indoor unit error codes and corresponding LED display indicators.
Troubleshooting steps for communication errors after tracking.
Troubleshooting steps for indoor temperature sensor errors (E121).
Troubleshooting steps for indoor heat exchanger sensor errors (E122).
Troubleshooting steps for indoor unit float sensor errors (E153).
Troubleshooting steps for indoor fan errors (E154).
Troubleshooting steps for EEPROM circuit failures (E162).
Troubleshooting steps for communication errors after tracking.
Initial diagnosis steps for outdoor unit power issues.
Troubleshooting steps for indoor/outdoor communication errors (E202).
Troubleshooting steps for communication errors between outdoor unit INV and MAIN MICOM (E203).
Troubleshooting steps for outdoor sensor errors (E221, E231, E251, E320).
Troubleshooting steps for compressor down due to freezing control errors (E403).
Troubleshooting steps for pipe blockage errors (E422).
Troubleshooting steps for outdoor unit fan errors (E458, E475).
Troubleshooting steps for compressor starting or rotation errors (E461, E467).
Troubleshooting steps for full current or PFC over-current errors (E462, E484).
Troubleshooting steps for IPM (Over Current) errors (E464).
Troubleshooting steps for DC LINK errors (E466, E483, E488).
Troubleshooting steps for gas leakage errors (E554).












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