Electronic combustible gas leak detection confirms bleed through from the gas valve. OEM carrier two-stage gas valve needs replaced Gas is turned off at the supply line stop outside of the furnace Process warranty parts at haybegger Install replacement two-stage gas valve and set gas pressures Hi stage 141° f Lo stage 129 Resurface flame sensor Install new 16x25x1 plated air filter from truck stop Equipment returned to cooling mode on thermostat demand after completion of today's work