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verify that the orifice is clear of oil and debris to maintain flow coefficients
this switch features a fixed 170°F trip point and a 130°F reset differential (40°F drop)
The Nordyne 903600 Flame Sensor is a performance-critical safety component designed for precise flame rectification in gas-fired heating systems
Most Reznor burner manifolds require a standard deep-well socket or nut driver for removal and installation of the orifice plug
or if you receive a specific "limit switch open" error code on the control board
Nordyne 632443R Pressure Switch verify that the orifice isThe Nordyne 632443R is a critical OEM replacement pressure switch designed for induced draft furnaces. Engineered to monitor the differential pressure between the draft inducer motor and the flue, this SPST (Single Pole Single Throw) switch is factory calibrated to a precise 0. 85" WC (Water Column) trip point. It features a 1 4" barbed connection for standard pneumatic tubing and two terminal electrical contacts for direct furnace control board