Rheem Defrost Controls

Overview

The RHEEM sp13447b is a flame sensor and wiper replacement kit designed for use in Flammable Vapor Ignition Resistant (FVIR) water heater systems. This kit provides the components needed to service or restore the flame-sensing assembly within a FVIR-equipped unit, ensuring the system can properly detect burner operation and satisfy safety interlock requirements. Licensed plumbers and water heater service technicians typically handle this repair as part of a diagnostic or warranty-related service call. The kit addresses common failure points in the FVIR sensing circuit and is designed as a direct OEM-style replacement. This replacement kit applies to residential tank-type gas water heaters equipped with a FVIR system, which became a code-required safety feature on units installed near floor level where flammable vapors may accumulate. The sensor and wiper components work together within the sealed combustion chamber assembly. When the flame sensor fails or the wiper mechanism degrades, the unit may lock out or fail to ignite. This kit restores normal function without requiring full burner assembly replacement. Key Features OEM replacement kit for FVIR flame sensor and wiper assembly Designed to restore proper flame detection in FVIR-equipped gas water heaters Addresses sensor and wiper failure modes that cause ignition lockout Direct fit replacement reduces diagnostic and repair time Compatibility Designed as an OEM-style replacement for RHEEM and RUUD residential gas water…