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Snowflake Aircon Services

Aircon louvre not moving

A stuck louvre is a control and movement pattern issue. The flap may fail because of the swing motor, linkage, command path, or a simple obstruction.

Common causes

A symptom is just a starting point. The same problem could be a quick fix or a major failure. The paths below show the most common causes, but only a proper check can prove what is really wrong.

01

Swing motor response fault

Book a check

The unit receives the swing command but the flap does not move correctly because the motor is weak, stuck, or unstable.

  • Cooling can still be normal while the flap stays in one angle.
  • Small clicking or jitter sound comes from the flap area.
  • The flap may move a little, then stop or return to the same position.

The Fix: We confirm command response and flap movement path before calling it a swing motor fault.

Watch out: Replacing the motor first can fail if the linkage is the real problem.

02

Linkage jam or movement obstruction

Book a check

The flap mechanism is blocked or misaligned, so the motor command is present but movement is restricted.

  • Flap movement looks uneven or catches at one point.
  • The sound pattern repeats at the same flap position.
  • Swing command appears to trigger but full movement does not happen.

The Fix: We inspect the flap movement path and linkage behavior before any part recommendation.

Watch out: This often gets misread as a board problem when the fault is mechanical movement.

03

Control path issue causing repeated drive attempts

Message now

A control path issue can send unstable commands and cause repeated drive attempts that create noise or stress at the flap assembly.

  • Flap movement attempts repeat without a stable response.
  • Clicking grows louder or more frequent when swing is triggered.
  • Other command functions may also behave strangely at the same time.

The Fix: Stop forcing swing commands and let us assess the control path and flap assembly together.

Watch out: Manual forcing of the flap can damage the linkage and make diagnosis harder.

Not Always A Fault - mode settings can stop swing movement

Some operating modes or settings can hold the flap in a fixed angle. This can look like a fault when the unit is simply not in a swing pattern.

How to tell

  • Cooling behavior is normal and the flap position stays stable without jitter or clicking.
  • The flap responds later when the operating mode or airflow direction setting changes.
  • There are no repeated movement attempts or abnormal sounds from the flap area.

If the flap still does not respond and the pattern includes clicking or jitter, treat it as a diagnosis issue.

What To Note Before You Contact Us

Observe the flap behavior safely while the unit runs:

  • Whether the flap is fully stuck, moves slightly, or jitters in place.
  • Whether clicking happens only when swing is triggered or stays during normal run.
  • Whether cooling is normal while the louvre issue happens.
  • Whether other remote commands work normally at the same time.

These details help us separate motor, linkage, and control path issues before any repair scope is proposed.

Stop Using The Unit If You Notice These

Louvre issues are often non urgent, but stop use if the pattern escalates into an electrical or mechanical safety sign.

  • Burning smell or electrical smell
  • Sharp crackling from the indoor unit
  • Loud repeated knocking from the flap area

Common questions

Same situation with your aircon?

Describe what's happening. We'll work out the likely cause before recommending anything.

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