What action should be taken if the compressor discharge temperature is excessively high?

When the compressor discharge temperature is excessively high, inspecting for faulty compressor valves is a crucial action to take. High discharge temperatures can indicate that the compressor is working harder than normal, potentially due to refrigerant not circulating properly through the system. Faulty valves can cause improper sealing or flow, leading to reduced efficiency and increased temperatures. By inspecting and, if necessary, replacing these valves, you can restore proper function, ensuring the refrigerant flows correctly and the compressor can operate within its designed temperature range.

Adjusting the refrigerant charge, changing the condenser fan speed, or adding insulation to refrigerant lines might seem relevant but would not directly address the potential internal issues of the compressor. Each of these options may contribute to overall system performance, yet they do not provide a solution to the root cause of high discharge temperatures that faulty valves represent.