Good Afternoon! I have a 2005 EB with 139,000 miles on it. The rear heat in my vehicle is not blowing through the vents. Heat is coming out through the dashboard vents however. I recently refilled the coolant to proper levels and the problem persists. I do not have the characteristic rear passenger side actuator clunking sound, as my rear heater door blend actuator used to do this and was replaced in 2015 at 109,000 miles. The air conditioning in the rear does work properly. I believe this problem was fixed after the rear heater door blend actuator was replaced, but it is difficult to pinpoint when the problem returned, as I live in Texas and do not have to operate my rear heat very often. Let me know if you need any more information, thank you for your time and help.