RepairPal's independent, master mechanics track down the best of the best in auto repair. Learn more »
Get the latest advice about your car
Coolant level is good. Rear blows cold at all times, no matter what setting the heater control is on. Front heater works well.
sounds like you have a problem with the hot/cold damper door or motor, in the the rear heater control. This will not be an easy repair for the DIY, if you have not done many car repairs.