Lochinvar & A.O. Smith 100279407 Flame Sensor 321042-401 or "AC Reversed" and ignition

or "AC Reversed" and ignition faults on the UIM display

Common Questions What is the shaft size compatibility for the VTD-1405

Automatic reset functionality: Eliminates the need for manual intervention by closing the circuit once the unit cools to 175 degrees F

Which valve models use the 30041050-835 disc

Lochinvar & A.O. Smith 100279407 Flame Sensor 321042-401 or "AC Reversed" and ignitionThe Lochinvar & A. O. Smith 100279407 Flame Sensor is a critical safety component engineered for precise flame rectification in high efficiency boilers and water heaters. This original equipment manufacturer (OEM) part is designed for rear mount installation, ensuring the control module receives an accurate microamp signal once a flame is established. When your system faces intermittent ignition lockouts or fails to sense a burner flame, replacing the