Improper installation of electrical controls and safety devices can lead to serious consequences, including system malfunction, reduced efficiency, and even safety hazards. Inadequate wiring can cause electrical shock, fires, or equipment damage, while incorrectly installed devices may fail to trigger, leading to overheating, freezing, or other system failures. Furthermore, improper installation can void warranties, increase energy consumption, and result in costly repairs or replacements. It is essential to follow proper installation procedures and guidelines to ensure the safe and efficient operation of HVAC systems.