OEM part number

809000040 Flue gas sensor plug

Rinnai part 809000040. Listed for 8 models below.

Rinnai E-Combi condensing combi boiler (E50CRN, E75CRN/CRP, E110CRN/CRP)

Flue gas sensor plug. Fits all 8 models in the series:

Source: Rinnai E-Combi Series Installation & Servicing Instructions (8U516009 V0116), page 82. Full E-Combi parts list

Part numbers are taken from the manufacturer’s published repair parts documents and are listed so you can identify the right part. Manufacturers replace and supersede numbers over time, so confirm the number with your distributor before you order, and use factory-authorized parts on equipment under warranty. Replacing gas, electrical and refrigerant parts is work for a licensed technician. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.