Some 2009-2011 RAV4 vehicles with Automatic Air Conditioning systems may exhibit a condition where the HVAC system intermittently blows warm air from the vents with the A/C on. Diagnostic Trouble Code B1479 (Flow Sensor Circuit) may 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. See Technical Service Bulletin 0388-09 Denso 471-1617 A/C Compressor
