What are the reasons for the rear air conditioning not blowing air in the Mercedes-Benz GLA200?
4 Answers
Specific reasons for the rear air conditioning not blowing air in the Mercedes-Benz GLA200: 1. Valve malfunction causing poor opening: When the plastic parts of the air outlet valve age or screws fall off, preventing normal opening and closing, it will affect the air output. The valve can be gently pried open with tools. 2. Damaged air ducts: The air ducts of car air conditioners are made of plastic, which can age, crack, or wear due to interference with other components over time. When the ducts are damaged, air will leak from the damaged areas. It is recommended to visit a 4S shop or repair shop for inspection and replacement. 3. Blocked ducts or air filter: Over time, debris such as leaves, lint, and dust can accumulate in the engine compartment, blocking the ducts and reducing the air output efficiency. If the air filter is not replaced for a long time, it can also decrease the air output efficiency. In such cases, the ducts can be disassembled to remove the debris, and the air filter should be checked regularly.
I've been repairing Mercedes-Benz vehicles for over a decade, and there are quite a few reasons why the rear air conditioning might not blow air. The most common issue is a faulty blower motor under the rear seats, as the Mercedes GLA200's blower location is prone to dust accumulation, leading to blockages or burnout. Another possibility is clogged air ducts—the rear ventilation channels are narrow and long, making it easy for debris to get stuck. Additionally, control unit or wiring failures can cause this, such as a broken relay interrupting the signal. I recommend first checking the rear vents for any obstructions and then inspecting whether the cabin air filter needs replacement. If these aren't the issues, it's best to visit a professional shop to diagnose the electrical circuits with specialized equipment rather than attempting DIY disassembly. Regular maintenance to clean the blower area is crucial, otherwise it can fail quickly.
I've been driving a Mercedes-Benz GLA200 for three years and have encountered this issue before, sharing some experience. The rear AC not blowing air might be due to incorrect settings, such as the AC mode being set to front-only or the airflow direction button not activating the rear. Also, a dirty filter can block airflow – my car's airflow reduced to nothing when the filter was clogged with dust, but it worked fine after cleaning. Another possibility is water leakage in the rear air ducts freezing and causing blockage, especially in low winter temperatures when the fan can't turn. It's recommended to first check the rear vents and filter location yourself and try cleaning them. If that doesn't help, take the car to a repair shop for inspection without delay, as it's unbearable for rear passengers in summer.
I usually enjoy tinkering with cars, and the lack of airflow from the rear AC in the Mercedes-Benz GLA200 is quite annoying. Most of the time, it's because the rear fan is stuck or broken—the fan is too small and easily clogged with dust. It could also be due to an air leak in the AC ducts or a blown fuse. A simple fix is to try increasing the fan speed to see if it helps. If that doesn't work, check the air filter or vents for blockages. My neighbor's car had the same issue, and replacing the air filter solved it.
