Aircon is not cold enough>Clogged filter?

Fundamental Concept:

The aircon is producing cold air, but it is not strong enough to reach you. Solution is to improve on the air flow.

man facing aircon with cold weak air

Systematic Troubleshooting (for layman):

Step 1:
Open the aircon lid cover, you wil see 2 pieces(usually) of plastic net filters.

aircon lid open

Step 2:

Check if the filters are dirty.

dirty aircon filter

Yes, they are as dirty as the picture above.
No, they are okay.