55037473AB HVAC A/C and Heater Control with Blower Motor Switch for TJ 1999-2004, HS-373.This control unit manages the heating, ventilation, and air conditioning system, including blower motor.Designed as a direct replacement for the specified model years, it integrates with the existing dashboard controls to regulate cabin temperature and airflow.The unit is engineered for straightforward installation and consistent performance under normal operating conditions. Compatibility Note: This is a third-party part.All brand/model references are for fitment purposes only.