Good morning my friend daniemiba, when making a query here, some more data are usually given, such as the btu, and the time the team has, with that one could give a better diagnosis, because I tell you that if the air has more than 8 years could be a lack of a sweep in the pipes for possible obstruction in the capillaries, that could cause the compressor at startup to consume more amperage called RLA, than normal and that is why the fan speed drop, some of the causes of that the air freezes are the following: lack of speed in the fan which reduces the transfer of color in the evaporator, lack of maintenance (wash it well with a hydro-ket), and verify that the vulvo or sensor is well attached to the evaporator, Bone the wand, in this case for being your analog air, which is seen when you remove the front mask of your air, that must be well attached to the evaporator, bone from the hive or coil as you know it. Hope this can help you. Greetings.