I am looking for a few Suggestions on what may fix a heater issue i have recently been having. On the driver side, the heater works well in all modes (auto/manual in all combinations). The passenger side, however, blows relatively colder air than the driver side. With both temps at 85, the driver side is fine, but the passenger facing body and feet vents, as well as the defrost vents blow cold. Because I am now out of the warranty period and would like to avoid the excessive charges at the dealership, any ideas on what may be the culprit?