Maintaining air conditioning for 2008 and later Hondas has become difficult for home mechanics because parts such as fasteners, clips, and electrical connectors are hard to find. Start by letting a dealer service department or automotive air conditioning shop relieve the pressure from your air conditioning before you keep going. Unplug the cable that connects to the car's negative battery connection. Open your engine's cooling system and disconnect both heater hoses where they enter and leave the heater core through the firewall. Pull off the instrument panel. Unbolt and shift aside the insulator panel. Unscrew and undo all anchoring connectors so we can take out both the floor duct and its mounting parts. Before continuing, disconnect and move aside the Remote Function Actuator module bolts. Then, remove the aspirator from the temperature sensor at the thermal housing where the heater core and evaporator core join. Pull the pin from the adapter, then pull out the adapter from the console duct. Loosen and remove all bolts holding the heater core and evaporator core housing. Take off the floor duct adapter's fasteners and pull away both the adapter and the housing. Free the electrical connections and keepers from the heater core wiring, and take off all connector plugs and wires from the housing. At last, carefully take out the heater core and evaporator housing while keeping rags and old towels around the car interior to stop any damages. Free the dash panel seal from around the heater core tube support. After that, unscrew and take out the heater support bracket. By disconnecting mounting bolts from the heater core plenum chamber and taking it apart from its housing, you can easily pull the heater core assembly away. To install the heater core, start by doing the opposite of what you did during removal. Drain and refill the coolant system, letting air out. Then take the car to a shop to evacuate, refill, and check your system for leaks.