Electric Vehicle Maintenance: A/C Desiccant Replacement More coming soon! Check back as we share more about this important – and often overlooked – electric vehicle maintenance service. Tesla Model 3 with frunk removed.Using Tesla software to allow for refrigerant removal.Recovering (removing) the refrigerant from the thermal management system.Old desiccant removed, new bag ready to install.Performing a 30 minute vacuum to boil out moisture in the system.Refrigerant removal (heat pump Model 3/Y)Refrigerant removal (heat pump Model 3/Y)Desiccant removal (heat pump Tesla Model 3/Y)