Hi, why not have your A/C units re gassed, that will return them to near factory performance without going to additional unnecessary expense. We have two of the latest Penguin 2 units on our 2019 CC Champagne 38EFK. One unit has a heat pump, the front one doesn’t. Shortly after purchase in 2019 (within a month), the front one failed, leaking it’s refrigerant. This was due to a manufacturing fault; a “P” clip was omitted from a pipe, which then vibrated and broke. My dealer informed me that this was a widespread problem and that he had changed every unit that was not Heat Pump equipped.