What would cause a new brake caliper to stick?

A new brake caliper may stick due to improper installation, such as misalignment or failure to lubricate the sliding pins and mounting hardware. Contaminants like dirt or moisture can also cause binding. Additionally, if the brake line is pinched or damaged, it can restrict fluid flow, leading to a stuck caliper. Lastly, a malfunctioning master cylinder may not release pressure, causing the caliper to remain engaged.