How to Clean a Clogged Car Air Conditioning Pipeline?
3 Answers
Weld off and remove the drying filter from both ends, separate the high and low pressure pipes, then block the low pressure pipe and start the compressor of the machine to make it work. Block the process pipe and weld shut the end of the low pressure capillary tube. The compressor starts working to self-suck, drawing moisture from the low pressure side to the high pressure side, thereby draining and clearing the moisture from the low pressure side. After powering off, quickly replace the drying filter, reconnect all pipelines, start the machine, and add refrigerant.
I've encountered dirty clogged air conditioning pipes several times, which is usually caused by oil or dust accumulation, requiring careful cleaning. The first step is to evacuate the refrigerant, but it must be done with professional tools, such as using a vacuum pump to remove the refrigerant to avoid chemical leaks. Then, use a specialized cleaning agent to flush the pipes, injecting it under high pressure to remove blockages. After flushing, it's essential to check the pipes for leaks and confirm they're intact before recharging the refrigerant. The entire process should be carried out in a well-ventilated area to prevent inhaling harmful gases. If you're not experienced, it's recommended to go to a repair shop; they handle it more safely and can also check the compressor. Regular maintenance of the air conditioning filter, including periodic cleaning, can prevent clogs and extend the life of the air conditioning system.
When dealing with air conditioning line blockages, I believe the key lies in professional methods. First, use equipment to extract the refrigerant to ensure system safety. Then, circulate cleaning fluid inside with controlled pressure—too high can damage the pipes, too low won't clean thoroughly. After flushing, thoroughly inspect the pipeline's sealing to prevent leaks or re-blocking. This job is best handled by a reliable mechanic with tools like spray guns and testers, usually completed within an hour. Neglecting a blockage affects cooling efficiency and may cause odors. Regularly using recirculation mode reduces dust entry, and replacing the cabin air filter annually saves money and hassle.
