The diagnostic LED blinks specific codes to identify issues such as flame signal loss

Robust Construction: The extruded aluminum frame resists corrosion and remains lightweight for easier overhead handling during HVAC zoning installs

This high-efficiency motor is sourced directly from the manufacturer

a significant deviation indicates it is time for a replacement

Lochinvar & A.O. Smith 100110901 Window Observation 326070-701 The diagnostic LED blinks specificUpgrade your system monitoring with the Lochinvar & A. O. Smith 100110901 Window Observation assembly. This genuine OEM sight glass replacement is a critical component for service technicians performing routine combustion analysis or checking burner flame quality in high efficiency Lochinvar boilers and A. O. Smith water heaters. Designed to withstand the thermal stress of sealed combustion chambers, this durable observation port ensures an airtight