Window air conditioning cooling effect is poor, the evaporator below the frost, the above is not cold, similar to normal temperature
(Outdoor temperature of more than 35 degrees air conditioning cooling capacity will decline, the higher the temperature the greater the cooling capacity decline)
If it is the first evaporator below the frost, run for some time to spend, then you have no problem with the air conditioning. You look at it. Recently, the South air conditioning generally reflect the poor cooling effect, and the outdoor temperature is too high
If the frost is below the evaporator and the frost from the capillary to the evaporator is thicker, it is possible that the filter is jammed, but it is less likely to have a 3.2A block of operating current.
As you said: voltage, compressor, fan, start the capacitor are normal, you see the compressor running current is 3.2A normal, (1P window machine input power also about 750 watts. Running current of about 3A)
