Why is there no air coming from the rear air conditioning vents?

[LunaAnn]

Here are the reasons why the rear air conditioning vents may not be blowing air: 1. Rear air vent valve: Check if the valve of the rear air conditioning vent is closed. Normally, the valve of the rear air conditioning vent should automatically open when the air conditioning is turned on. However, if the valve malfunctions, it may remain closed, preventing air from flowing through the rear vents. 2. Leakage in the evaporator housing: There might be air leakage at the connection between the evaporator housing and the air duct. If there is leakage in this area, the cold air meant to be released through the rear vents will escape from the leak, resulting in reduced airflow from the rear vents. 3. Air filter issue: The air filter is located at the intake of the blower. All cold or warm air blown by the car's air conditioning system passes through the air filter. However, the air filter is prone to accumulating dirt, dust, leaves, insect remains, or even rodent carcasses. If the air filter is not replaced regularly, these obstructions can severely restrict airflow.