Lochinvar & A.O. Smith 100109151 Switch 326058-758 When replacing the pilot assembly

When replacing the pilot assembly

Can I clean this probe instead of replacing it

Confirm that your unit uses Hot Surface Ignition and cross-reference the serial number to ensure it was manufactured prior to the 2007 transition to newer control layouts

If your heater is short-cycling or the control board flashes a code indicating a limit trip

While designed by Honeywell

Lochinvar & A.O. Smith 100109151 Switch 326058-758 When replacing the pilot assemblyThe Lochinvar & A. O. Smith 100109151 is a critical safety component designed for high efficiency BTH (Best Tankless Hybrid) water heaters and commercial boilers. This Low Gas Pressure Switch is factory calibrated to a 5" WC (Water Column) set point, serving as a primary sentry to ensure safe combustion cycles. In the field, this switch monitors the incoming gas supply pressure to prevent the burner from firing under insufficient pressure conditions,