or if the needle does not return to zero when the system is depressurized

For technicians performing annual maintenance

Common Questions What causes this drain pan to fail

provided physical dimensions allow for secure mounting

How do I know if this coil is compatible with my valve

Auburn E5-FRS-4-4 Flame Rod 323055-751 or if the needle doesThe Auburn E5 FRS 4 4 is a professional grade 4 inch flame rod engineered for precision sensing in demanding HVACR environments. Designed for high temperature durability, this flame sensor features a robust Kanthal electrode capable of withstanding operating temperatures up to 2350F, ensuring reliable flame rectification across industrial burners, commercial boilers, and residential furnaces. With its standardized 1 4" NPT mounting (1 4 18 NPT thread)