Reasons for Water from Car Air Conditioning Flowing into the Car
2 Answers
Reasons for water from car air conditioning flowing into the car: 1. Incorrect installation of the drain pipe: Cars have a dedicated air conditioning drain pipe located in the right front footwell area, with the outlet also on the right side of the car. If the drain pipe is incorrectly installed after the dashboard is removed and reassembled at a repair shop, water can flow into the car. A common symptom is water stains on the right front floor mat. 2. Internal blockage of the evaporator: For new cars, the evaporator might be internally blocked. If the evaporator's drain outlet was not properly treated during manufacturing, there might be a rubber film covering the drain outlet, preventing water from draining. 3. Poor connection: Another reason could be the evaporator's drain outlet connector, where the connected rubber drain pipe might have come off or is not properly connected.
I've been studying car air conditioning systems for quite some time. When the AC is running, the evaporator condenses moisture from the air to form water droplets. Normally, this water is drained outside the vehicle through a drain tube. However, if water leaks inside the car, it's usually because the drain tube is clogged. Dust, leaves, or dirt accumulating in the tube can cause water to overflow into the cabin, especially during hot and humid summer conditions. This can also happen if the tube ages and cracks or isn't sealed properly after repairs. I can teach you to use compressed air to regularly blow out the tube to prevent clogs. It's best to address this early to avoid wet interiors that can lead to mold, odors, and health issues. Older cars in particular need regular checks of the sealing rings.
