别克昂科雷空调风门执行器 20826182 / 604-140 自动温控精准调节

Buick Enclave 2008-2012 (3.6L) A/C air door actuator 20826182 designed for automatic climate control systems, ensuring precise actuator angle control to prevent air direction misalignment or temperature runaway. OEM number 20826182, compatible with replacements 604-140, 1573989, etc. Replacement difficulty moderate; disconnect battery negative and manually calibrate door position before installation to avoid gear misalignment. If A/C air output is abnormal or temperature adjustment is inaccurate, actuator failure is indicated; replace to restore climate control accuracy.