Rheem furnace — Rheem R96V modulating condensing gas furnaces documented in the Rheem service literature Error Codes Directory

Rheem two blinks: the draft proving circuit stopped the sequence

Two blinks on a Rheem furnace control identifies a pressure switch condition in the draft proving circuit. The switch is the device that tells the control whether the inducer has established the airflow the burner needs, so the blink count locates the circuit that failed to reach its expected state rather than the part that caused it. Applies to: Rheem R96V modulating condensing gas furnaces documented in the Rheem service literature This reading follows the diagnostic table published for the Rheem R96V modulating condensing furnace. Rheem and Ruud have used different blink assignments across control generations, and a chart written for another Rheem furnace line can give a different meaning for the same count. Match the model on the rating plate. Owner-safe checks: Count the blinks carefully, since two blinks and three blinks are easy to confuse when the pause between groups is short. | View the vent and intake terminations from ground level and note ice, snow, nests, or vegetation without climbing or reaching in. | Record the outdoor temperature, wind, and whether ignition was ever attempted on each failed cycle. Qualified technician: Measuring draft pressure against the published value, inspecting the inducer wheel, and clearing condensate paths are licensed gas-furnace tasks. | A pressure switch must never be bridged or bypassed to make a furnace run, because it is the only device confirming that combustion products are leaving the building.