I have a 2008 Honda Accord. Recently hot air is blowing out of drivers side A/C vents and cold air on passesgers side. The car does have a Dual A/C control. Does anyone know what is causing this?

 

Honda had info. that an indicator of low refrigerant is when the left dashboard vent is warmer than the right one, with the A/C on. When that happens, the evaporator core isn't being flooded with enough liquid refrigerant, causing it to fully vaporize halfway through the core. As a result, the side of the core with some refrigerant (the right side) stays cold, while the side that's fully vaporized (the driver's duct) is warmer by about 20 degrees (or more in some cases).

 

See article:

 

Thank you. I will print this and take it to the shop with me and see.