Samsung WindFree 1-Way Cassette Aircon E403 Error Code

What does Samsung E403 mean?

Samsung WindFree 1-way cassette E403 is listed as compressor stopped after freeze detection for the sixth time and outdoor freezing detected after the compressor stopped in the Samsung AJ***TN1DKH WindFree 1-way cassette and Samsung CAC Inverter 50 Hz Australia fault lists. This meaning comes from the manufacturer's own diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.

What to do now

Use these steps to record evidence and match the installed model to its service manual before diagnosis or a repair quote.

Record E403 and match the service manual
Record E403 and stop there; the manufacturer gives no customer reset procedure. Arrange diagnosis with the matching service manual.
No manufacturer reset steps listed for E403
Capture the complete E403 error code and model stickers first. The manufacturer lists the meaning but no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
E403 error code, a clear display photo, Samsung WindFree 1-way cassette indoor and outdoor model stickers, the controller, gateway, or unit that reported the code, operating mode and affected area, and any power or setting changes made after the code appeared

Choose the listing that matches your unit

The same code has more than one listed meaning. Match the model family, the system type and the unit that shows the code before approving parts.

Code, what it means, and what to check first
Code	What it means	What to check first
Samsung AJ***TN1DKH WindFree 1-way cassette	Compressor stopped after freeze detection for the sixth time	Match this meaning to your installed model and the unit that shows the code, then use the checks below.
Samsung CAC Inverter 50 Hz Australia	Outdoor freezing detected after the compressor stopped	Match this meaning to your installed model and the unit that shows the code, then use the checks below.

Code
Samsung AJ***TN1DKH WindFree 1-way cassette
What it means
Compressor stopped after freeze detection for the sixth time
What to check first
Match this meaning to your installed model and the unit that shows the code, then use the checks below.
Code
Samsung CAC Inverter 50 Hz Australia
What it means
Outdoor freezing detected after the compressor stopped
What to check first
Match this meaning to your installed model and the unit that shows the code, then use the checks below.

Guidance for your model

Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.

Guidance for your model
Detail	What it says
Singapore / model note	Official Samsung regional AJ***TN1DKH WindFree 1-way cassette installation-manual row. Confirm the exact indoor and outdoor family before using this interpretation; the Malaysia support source does not establish exact Singapore supply.
Singapore / model note	Official Samsung 50 Hz Australia CAC table for the R410A cassette and ducted families in DB98-11086F(3). It does not prove exact Singapore supply; confirm the installed model, full regional suffix, and matching local service documentation.

Detail
Singapore / model note
What it says
Official Samsung regional AJ***TN1DKH WindFree 1-way cassette installation-manual row. Confirm the exact indoor and outdoor family before using this interpretation; the Malaysia support source does not establish exact Singapore supply.
Detail
Singapore / model note
What it says
Official Samsung 50 Hz Australia CAC table for the R410A cassette and ducted families in DB98-11086F(3). It does not prove exact Singapore supply; confirm the installed model, full regional suffix, and matching local service documentation.

What to check before repair

The manufacturer's fault table gives the code's meaning, not a repair procedure. Capture evidence first; model-specific tests belong to the matching service manual.

Homeowner checks and technician confirmations
You can check	Technician should confirm
Photograph the complete E403 error code before taking any action.	Confirm E403 exactly and record which controller, gateway, or unit reported it.
Capture the Samsung WindFree 1-way cassette indoor and outdoor model stickers and identify which controller or unit reported it.	Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope.
The manufacturer provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action.	Follow the matching service-manual procedure and keep measured test evidence before naming a failed part.

You can check
Photograph the complete E403 error code before taking any action.
Technician should confirm
Confirm E403 exactly and record which controller, gateway, or unit reported it.
You can check
Capture the Samsung WindFree 1-way cassette indoor and outdoor model stickers and identify which controller or unit reported it.
Technician should confirm
Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope.
You can check
The manufacturer provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action.
Technician should confirm
Follow the matching service-manual procedure and keep measured test evidence before naming a failed part.

Source-bounded repair decision

Samsung WindFree 1-way cassette E403 confirms the fault label the manufacturer lists, not a failed part or repair procedure. Match the installed model to its service manual and require measured diagnostic evidence before approving parts, settings, or refrigerant work.

Whether the reporting controller or unit and exact installed model are confirmed.
What the matching service-manual procedure and measured tests show.
Whether the proposed repair names the evidence for the failed part or condition.

Samsung E403 questions

What does the Samsung E403 error mean?

Samsung WindFree 1-way cassette E403 is listed as compressor stopped after freeze detection for the sixth time and outdoor freezing detected after the compressor stopped in the Samsung AJ***TN1DKH WindFree 1-way cassette and Samsung CAC Inverter 50 Hz Australia fault lists. This meaning comes from the manufacturer's own diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.

Can I fix a Samsung E403 error myself?

No. E403 needs a technician's measurement before parts are decided. Photograph the complete E403 error code before taking any action. Capture the Samsung WindFree 1-way cassette indoor and outdoor model stickers and identify which controller or unit reported it.

Is it safe to keep running the aircon with an E403 error?

Record E403 and stop there; the manufacturer gives no customer reset procedure. Arrange diagnosis with the matching service manual.

What causes a Samsung E403 error?

Samsung E403 has a listed meaning that depends on the exact model and on which unit shows the code. Use the decoder on this page before assuming a specific cause.

Will a Samsung E403 error need a repair or a full replacement?

Samsung WindFree 1-way cassette E403 confirms the fault label the manufacturer lists, not a failed part or repair procedure. Match the installed model to its service manual and require measured diagnostic evidence before approving parts, settings, or refrigerant work.

What should I send a technician about a Samsung E403 error?

Before booking, send: E403 error code, a clear display photo, Samsung WindFree 1-way cassette indoor and outdoor model stickers, the controller, gateway, or unit that reported the code, operating mode and affected area, and any power or setting changes made after the code appeared.

Where to go next

Confirm the fault

Share the error code, model number and symptoms so we can assess the likely cause.

Not the right code?

Browse the full Samsung list or check a few codes in the same fault category.