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Why Is My PRISM+ Aircon Trunk Moulding?

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PRISM+ Support teamUpdated 2 May 2026

If you notice mould forming on the Aircon trunking, this may be caused by condensation around the trunking.

What Can I Check?

Try the following checks:

  1. Increase the fan speed
    • Increase the Aircon fan speed slightly to help dissipate the cold air more effectively.
  2. Check the Airflow
    • Check whether air is still flowing smoothly from the Aircon.
    • If the airflow appears weak or restricted, this may require further attention.

Tip: If mould continues to appear after adjusting the fan speed and confirming that the airflow is normal, contact PRISM+ Support for further assistance.

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