Where is the heater control valve on a 1993 Lexus LS 400?

The heater control valve on a 1993 Lexus LS 400 is located in the engine compartment, typically near the firewall on the passenger side. It is connected to the heater hoses that run from the engine to the cabin heater core. To access it, you may need to remove some components or hoses, as it can be somewhat obscured within the engine bay. Always consult a repair manual for specific guidance tailored to your vehicle.