Can you use 407c in a r22 condenser?

Yes, you can use R-407C in an R-22 condenser, but it's important to note that the system must be retrofitted and compatible with R-407C. This refrigerant has different properties than R-22, so the oil type and charge amounts may need to be adjusted. Additionally, the performance and efficiency may differ, so it's advisable to consult a professional before making the switch.