TSB: Some RX 350 vehicles may exhibit a condition where the HVAC system intermittently blows warm air from the vents with the A/C ON. When this condition occurs, Diagnostic Trouble Code (DTC) B1479 (Flow Sensor Circuit) may also be stored in the A/C system as either a Current or History DTC. A malfunctioning A/C compressor
flow sensor may cause this condition.
