How do you replace ac expansion valve on 90 Honda CRX?

To replace the AC expansion valve on a 1990 Honda CRX, first ensure the system is decharged by a professional to remove refrigerant. Next, access the valve by removing the dashboard or components obstructing it, typically located near the evaporator. Disconnect the refrigerant lines and electrical connectors, then unbolt the old valve and replace it with the new one. Finally, reassemble everything, recharge the AC system, and check for proper operation.