Lochinvar & A.O. Smith 100288430 Switch L99H008 Built with a rugged frame

Built with a rugged frame for superior heat dissipation

Before swapping the board

buzzing is often caused by a faulty coil or debris in the core tube

5-liter tool designed for heavy-duty HVAC and commercial maintenance

this component preserves the original efficiency ratings of the equipment

Lochinvar & A.O. Smith 100288430 Switch L99H008 Built with a rugged frameThe Lochinvar & A. O. Smith 100288430 Low Air Pressure Switch is a critical safety component designed for high efficiency condensing boilers and water heaters. As a veteran technician knows, this normally open switch is calibrated to a precise 0. 75" water column (W. C.) set point. It serves as the primary "proof of airflow" for the inducer motor, ensuring that the combustion blower is creating sufficient negative pressure to safely evacuate flue