Ran diagnostic on both systems in home. Found both systems low on refrigerant and at risk to start freezing up soon due to current pressures. Recommendations to install flood protection. Rinsed down main floor unit to get more accurate reading on pressures. Cap and contactor are rusted and pitted. Systems both almost 20 yrs old. Couldn’t pin point leak during diagnostic leak search will be required to start the repair options. No work was done here, only troubleshooting and a quick water rinse down of main floor out door coil.