SplitAtlas

Samsung / WindFree Premium

Samsung TEST HEATING status display

Test heating means the outdoor unit is in a service test mode. It is not a normal homeowner repair code. Manual trigger: Test heating is an outdoor-board service/test indication.

All Codes
Urgency
informational
Verified
Jul 30, 2026
Fix path
Not an error

What it means

Test heating means the outdoor unit is in a service test mode. It is not a normal homeowner repair code. Manual trigger: Test heating is an outdoor-board service/test indication.

Urgency

Not an error

This is a normal status indication, not an error, unless comfort is poor, water is present, or the indication never clears.

Likely causes

  1. Temporary control memory or startup fault
  2. Incorrect board setup after installation or service
  3. Loose board connector or harness problem
  4. Failed indoor, outdoor, display, or main PCB

Homeowner fix

If a technician started the test, let them finish. If it appears during normal use and will not clear, turn the system off once and call for service.

When to call a pro

Call the installing contractor if the unit is stuck in test cooling or test heating.

Repair vs replace

This is a normal operating status, not a repair-or-replace decision.

Your Samsung model

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

See Samsungmini-splits ->

For your technician

Technician note: service/test status only; verify test mode before using fault diagnostics. Page context: Samsung maps this display to the WindFree Premium line; source: Samsung WindFree Premium R-32 Service Manual; display convention: match the letter T, letter E, letter S, letter T, letter H, letter E, letter A, letter T, letter I, letter N, and letter G 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.

Mini split lights blinking

Manual trigger

Test heating is an outdoor-board service/test indication.

Related codes

TEST COOLING status displayTIMER STANDBYPOWER-ON BLINK status displayWI-FI status displayTEST RUN status display

Source

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

Short quote: "Test operation at Heating mode"

Sourced Jul 2026

Next step

Back To HubDiagnosis toolModel catalog