There are 2 things that cause this: First, it freezes up for only two reasons. One is low on refrigerant and the other is usually your indoor blower is not working, which sounds like your issue. The blower motor itself could have failed or it could be a number of other problems causing your issue. The system needs to be diagnosed to be sure of the real problem. There is no reset, and I would recommend you have us come out today and don’t try to open the system and check yourself, as sometimes that can cause more issues. Also, turn off the system, as it will just freeze up again and could potentially harm your outdoor unit and compressor.