What are the reasons for the Toyota Corolla's air conditioning not cooling?

[LeilaDella]

Toyota Corolla's air conditioning not cooling reasons are as follows: 1. Dirty radiator: Dirt on the radiator and condenser leading to poor heat dissipation. 2. Electric fan malfunction: Normally, the electric fan has two speeds, a low speed and a high speed. If the electric fan does not reach high speed or the high speed is insufficient, the above phenomenon will occur. 3. Thermostat failure: Unable to open and close properly. If the thermostat opening is too small at normal temperatures, it will slow down the engine's coolant circulation speed, causing high water temperature at low speeds. A faulty water temperature sensor or the electric fan's temperature control switch can also lead to this phenomenon. 4. Excessive carbon buildup: Too much engine carbon buildup or excessive air conditioning system pressure: leading to poor engine performance, increased running resistance, and thus inability to cool.