HVAC Heater Blend Door Actuator – Reliable Replacement Solution Compatible Vehicle Fitment: Buick Skylark 1991 Cadillac Escalade 1999, 20022006 Cadillac Escalade ESV 20032006 Chevrolet Astro 19962005 Please verify exact compatibility using the Fitment Filter before . Part Reference Information: Location: Main, Auxiliary, or Main Rear positions in HVAC system Part Numbers: 604100, 89018356, 14455963, 16124922 Part Name: HVAC Heater Blend Door Actuator Key Features and Benefits: Direct replacement for worn or faulty HVAC heater blend door actuators, ensuring airflow and temperature control inside your vehicle. Restores proper function to your climate control system, allowing you to seamlessly adjust between hot and cold air. Compatible with multiple fitment locations, making it versatile for use in main or auxiliary HVAC systems. Manufactured to meet or exceed original equipment specifications for fit, performance, and durability. Easy installation with no modification required, reducing vehicle downtime. Performance and Function: This actuator controls the movement of the HVAC blend door, regulating air direction and temperature inside the cabin. Replacing a faulty unit eliminates issues such as inconsistent cabin temperature, inability to switch between heating and cooling, or unusual noises from your HVAC system. Practical Applications: 1. Restoring heating capability in winter months when the blend door fails and prevents warm air from entering the cabin. 2. Resolving cooling issues in summer by ensuring the blend door fully opens to allow proper air conditioning flow. 3. Fixing dualzone temperature discrepancies where one side of the vehicle receives different airflow than intended. This replacement HVAC Heater Blend Door Actuator provides consistent temperature regulation, dependable performance, and correct fitment for specified vehicle models and years, making it an essential component for maintaining interior comfort.