Where is ac valve for 2007 Ford Focus?

The AC expansion valve on a 2007 Ford Focus is located within the HVAC (Heating, Ventilation, and Air Conditioning) system, behind the dashboard. It's not easily accessible and requires significant disassembly to reach. You won't find it under the hood.

To replace it, you'll almost certainly need to consult a repair manual specific to your 2007 Ford Focus. The exact location within the dash can vary slightly depending on the trim level and specific HVAC configuration. Attempting to find and replace it without the proper knowledge and tools is strongly discouraged as you risk further damage. It's best left to a qualified mechanic.