Lochinvar & A.O. Smith 100109973 Switch L99H008 the pilot and main orifices

the pilot and main orifices must be correctly sized to the manifold for the specific fuel type being used

Always recalibrate the switch in its final mounted position

Key Benefits for Contractors: Universal Compatibility: Serves as a primary service part for the entire Trane Voyager product line and replaces several obsolete THT-series models

Common Questions What type of electrodes are compatible with this fitting

Industrial Durability: Rugged aluminum construction with high-quality synthetic rubber diaphragms for extreme temperature environments

Lochinvar & A.O. Smith 100109973 Switch L99H008 the pilot and main orificesThe Lochinvar & A. O. Smith 100109973 Blocked Inlet Switch is a critical safety component designed for high efficiency condensing boilers and water heaters. As a normally closed air pressure switch, its primary function is to monitor the intake system for airflow restrictions. If the intake air connection screen becomes clogged or the vent piping is obstructed, the switch detects a fall in pressure and opens the electrical circuit, instantly shutting