Housed in a durable phenolic case

with a steady 24V secondary output

While designed specifically for the Johnson Controls M91xx and M92xx series

Key Benefits Versatile Voltage Options: Compatible with 115V

Frequent tripping of the 135-40 limit switch is often caused by restricted airflow

Lochinvar & A.O. Smith 100338897 Gasket 323055-751 Housed in a durable phenolicWhen you're dealing with a flame failure: running lockout on a Lochinvar or A. O. Smith unit, the integrity of the combustion seal is the first thing to check. The Lochinvar & A. O. Smith 100338897 Gasket is a critical OEM replacement part designed specifically to provide a high temperature seal for the flame rod assembly. This flame rod gasket ensures that the interface between the sensor and the combustion chamber remains airtight, preventing vacuum