Where is heater control valve on 1994 Buick regal?

The heater control valve on a 1994 Buick Regal is located inside the passenger compartment, usually under the dashboard. It's not easily accessible without some disassembly. It's part of the HVAC (Heating, Ventilation, and Air Conditioning) system and often integrated into the blend door actuator mechanism.

You won't find it under the hood.

To locate the exact position, you'll likely need a repair manual specific to your 1994 Buick Regal. These manuals usually have diagrams and detailed instructions. You can find these manuals online through various sources (some are free, some are paid). Searching for "1994 Buick Regal repair manual" will yield many results.

Without a repair manual and the proper tools, accessing and replacing this valve is a challenging DIY job. Consider having a qualified mechanic diagnose and repair any heater issues.