Collection: Diagnostic Checklists / 故障检查表

Practical HVAC diagnostic checklists for common heating, cooling, airflow, thermostat, refrigerant, and equipment operation issues.

These checklists are designed for learning, field reference, and customer explanation support.

中文说明：

这里整理 HVAC 常见故障检查表，包括制冷、制热、气流、温控器、冷媒和设备运行相关问题。

这些资料适合学习、现场参考和客户解释使用。