Lochinvar & A.O. Smith 100271315 Limit Switch 320788-704 If your original hardware is

If your original hardware is missing

The A19AAC-9 is technically identical to the A19AAC-9C model

these tubes serve as a critical checkpoint for determining if a suction line filter drier or complete oil change is required

Corrosion Resistance: Non-metallic housing eliminates rust issues in outdoor or chemical-rich environments

including the 018000

Lochinvar & A.O. Smith 100271315 Limit Switch 320788-704 If your original hardware isThe Lochinvar & A. O. Smith 100271315 Limit Switch is a critical safety component engineered for high performance hydronic and water heating systems. As a veteran technician knows, maintaining the integrity of the safety loop is non negotiable. This OEM high limit switch is designed to monitor outlet water temperature and provide a positive safety shutdown by interrupting the electrical circuit if temperatures exceed the factory set threshold,