Ao Smith 100109372 Propane Temperature Control Fvir

Product Description

The AO SMITH 100109372 is a propane (LP) gas temperature control designed for Flammable Vapor Ignition Resistant (FVIR) water heater systems. It regulates gas flow to the burner based on water temperature demand and incorporates a fixed pilot pressure circuit with an Energy Cut-Off (E.C.O.) that interrupts gas flow when water temperature reaches 195 degrees F. The manifold pressure is set at 10 inches of water column, calibrated specifically for propane service. Installation and service are performed by licensed plumbers or gas appliance technicians working on residential or light-commercial water heating equipment.

This temperature control is intended for propane-fired water heaters equipped with FVIR technology. The left-hand thread burner tube connection is a key installation detail that distinguishes this control from natural gas variants. It is suited for residential tank-type water heater applications where a direct replacement for the gas valve and thermostat assembly is required. Technicians replacing a failed control on a propane unit should confirm the manifold pressure specification and connection thread orientation before installation.

Key Features

• Calibrated for propane (LP) gas service at 10 inches water column manifold pressure
• Integrated E.C.O. safety cut-off activates at 195 degrees F
• Fixed pilot pressure circuit for consistent ignition performance
• Left-hand thread burner tube connection — specific to LP configuration
• FVIR-compatible design meets current water heater safety standards
• Maximum operating temperature rated at 160 degrees F

Compatibility

Designed as an OEM-style replacement temperature control for AO SMITH propane-fired, FVIR-equipped residential tank water heaters. Confirm manifold pressure setting, gas type, and left-hand thread burner tube requirement before ordering.

Installation Notes

This control should be installed by a licensed plumber or qualified gas appliance technician. Shut off the gas supply and allow the water heater to cool before removing the existing control assembly. Left-hand thread connections require counter-clockwise tightening — confirm thread direction before applying torque to avoid damage. Work must comply with local gas codes and applicable sections of the IFGC.

Technical Specifications

• Gas Type: Propane (LP)
• Manifold Pressure Setting: 10 inches water column
• E.C.O. Cut-Off Temperature: 195 degrees F
• Maximum Operating Temperature: 160 degrees F
• Burner Tube Connection: Left-hand thread
• Application: FVIR water heater systems

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100109372