Consequences of a Clogged Car Air Conditioning Drain Pipe?
2 Answers
When the car air conditioning drain pipe is clogged, the following phenomena may occur: 1. After startup, the high pressure rises rapidly, the low pressure drops quickly, and then the pressure switch activates protection, cutting off the clutch and stopping the air conditioning. 2. After startup, the pressure difference between high and low pressure increases, the compressor discharge temperature rises, and the air from the air conditioning evaporator is not cold. Moreover, at the location of the clog, you can feel a clear boundary between hot and cold by touching it. Here is some additional information: 1. It is unlikely for car air conditioning blockages to occur in the pipes; they mainly occur in high-pressure circuits such as the expansion valve, receiver-drier, and condenser. 2. The expansion valve is the most common site for blockages because it has the smallest diameter, and its inlet has a filter screen where dirt in the system can get stuck.
The consequences of a clogged car air conditioning drain pipe can be quite severe. I once neglected it, and when the drain hole got blocked, the condensed water couldn't drain out and started pooling inside the car. The carpet got completely soaked, giving off a musty smell that was really unpleasant. If not cleaned up promptly, the accumulated water could seep into the control unit or wiring under the car, causing a short circuit and leading to air conditioning system failure. Over time, water stains can damage the interior, resulting in higher costs for cleaning or carpet replacement. Now, every summer, I make sure to check the drain outlet and use a soft brush to clean out any debris, keeping it dry and well-ventilated. Developing this habit helps maintain a more comfortable interior environment and prevents unexpected expenses, saving both money and hassle.
