Indoor unit makes loud rattling or buzzing noises during operation.

Safety first: Turn off power before tightening screws or removing covers.

• Step 1 – Check mounting: Gently push on the indoor unit. If it rocks or moves, the wall bracket may be loose. Tighten bracket screws into solid wall anchors.
• Step 2 – Inspect blower area: Open the front panel and look for foreign objects in the fan area. Remove any debris.
• Step 3 – Tighten screws: Remove the front cover and tighten visible screws securing the fan motor and plastic housing.
• Step 4 – Panel fitment: Reinstall the front panel carefully, ensuring all clips engage. Loose panels can buzz; apply thin foam tape at contact points if needed.