That old style AC needs replacement along with batteries powering it. Once I boarded the train from PRR and found the AC not working. TTE was asking the attendant to find the issue. Attendant later replied that all the switches were on but no power was going to the duct system. TTE initiated help at Adra which revealed a deep technical issue.
C1 and C2 are a bit refurbished but the AC is still the old.