allowing for optimized staging and load adjustments based on ambient conditions

When troubleshooting lockout codes or poor flame sensing

or diagonal—provided the flow direction matches the arrow on the body and the vent is protected from debris and moisture

Does it include the harness

Advanced Diagnostics: Features on-board LEDs to provide HVAC troubleshooting codes

Lochinvar & A.O. Smith 100110973 Switch 318423-701 allowing for optimized staging andThe Lochinvar & A. O. Smith 100110973 Blocked Flue Switch is a critical safety component designed for high efficiency boilers and commercial water heaters. As a veteran technician knows, this negative pressure switch (often referred to as a spill switch) is engineered to sense obstructions in the venting system, protecting the heat exchanger from hazardous flue gas recirculation. When the integrated sensor detects a lack of proper draft or a blocked