Ac repair in Gainesville. Discovered heat pump system frozen. Ran system in heat mode and thawed system out. Discovered weak secondary controller, burnt and pitted main electrical switch which is likely to fail soon, system has no water safeties, evaporator coil is rusted and corroded and likely to leak, indoor unit has concerning amounts to of organic growth on the inside of it which is being spread throughout the house as all air in the space goes through the unit. System has no restricted airflow which points to system being low on charge as the only reasons a system will freeze is lack of airflow or low on refrigerant. Outdoor unit has dirty condenser coil which inhibits refrigerant pressure readings. System is 15 years old and Replacement is highly recommended over repair as the system uses R22 refrigerant which manufacturing has been banned by the EPA and the typical lifespan of a system is 10-15 years.