Unit emits clicking or popping sounds from inside the cabinet during operation.

Safety: Unplug the unit before tightening panels or inspecting for ice.

Steps to reduce clicking/popping:

• Check for ice: Remove the front cover and inspect the evaporator coil for ice buildup. If present, clean the filter and coil and allow the unit to defrost.
• Tighten panels: Tighten screws on the front grille, side panels, and top cover to reduce movement noises.
• Relay sounds: Occasional clicks from relays are normal. Rapid, repeated clicking may indicate a control issue; if accompanied by performance problems, have the main control board checked or replaced.
• Monitor: If sounds are minor and the unit cools properly, they may be normal expansion noises.