Mazda 323F 12/01: Climate “wax contact” at 2nd blower stage ?

Hello, more and more often have a problem with my climate: When I turn on the climate at 2nd blower level, it happens that the control lamp in the air conditioner switch (A/C) goes on and off. I checked this. The blower continues to work undisturbed on the 2nd level. I then went around the car and then “heard” determined that the air conditioner also goes on and off. I can influence this by leaving the blower switch on the 2nd level, le Then the flashing stops, not always. As I said, only on the 2nd blower stage, on the other blower stages everything works perfectly. I have at the moment passed to operate the climate with blower level 1 or 3. But that is probably not a permanent state. Stage 1 is sometimes too little and stage 3 is actually almost always a bit too much. Stage 2 would actually be right.. Can this have to do with the blower switch? After all, the blower itself functions as if it were moving. ndfrei.. Go to info: The car has only run 26,000 km, “Opa previous owner” has probably used the climate almost never. And I also do not use it sooo much. Only on a little longer tours.. For shopping around the corner does not make any climate.. Will say, there can actually not be a mechanical wear somewhere? Maybe you have an idea.. Thanks and greetings.