Possible Reason
Dust may have accumulated in the circulating fan.
Solution
Please clean the circulating fan guard.

Possible Reason
There may be foreign objects stuck in the circulation fan.
Solution
Please remove the foreign objects from the circulation fan guard.

Possible Reason
The floor or desktop where the product is placed may be uneven.
Solution
Please place the product on an even surface or desktop.

Possible Reason
The circulation fan blades may not be properly fitted on the motor shaft.
Solution:
Please properly fit the circulation fan blades on the motor shaft.

Possible Reason
The battery may be dead.
Solution
Please replace the battery.
(Applicable model: CR2032)

Possible Reason
The remote control may not be facing towards the product straight.
Solution
Please change a position and face the remote control straight towards the signal receiver.