The Air stops very often giving no time to cool, it lasts five minutes working the compressor and rests 5 minutes working the fan and starts and so on, They know why this is happening, the thermostat knob is at maximum and still , do the same,. Thank you please ...

Good evening, it can be two things, the first is that the thermostat is defective by sending the compressor on and off very often, if the compressor when it turns off does not reach voltage, then it is the thermostat, the second is that the thermal protector of the compressor for high consumption, if you check when the compressor is turned off and verify and voltage is coming, then it is definitely because of the thermal protector of the compressor that is stopping and this can be due to many causes: Capacitor damaged or deficient, contacts loose or sulphated electrical, dirty rear honeycomb, excess refrigerant, plugging in the capillary tubes, unstable and out of range voltage (voltage), superheated compressor electric coils, etc.