How do you set a cad cell?

To set a cad cell, first ensure that the power to the system is turned off for safety. Locate the cad cell, usually found in the burner assembly, and adjust its sensitivity by turning the adjustment screw, typically clockwise to increase sensitivity or counterclockwise to decrease it. After making the adjustments, restore power and test the system to ensure the cad cell properly detects flame and operates the burner safely. Always refer to the manufacturer's guidelines for specific instructions.