What are the reasons for the Magotan's air conditioning not cooling?
3 Answers
There are several reasons why a car's air conditioning may not cool, including refrigerant issues, filter blockage, and saturated dryer canister. Below are detailed explanations of these causes for car air conditioning not cooling: Refrigerant Issues: One reason a car's air conditioning may not cool is due to problems with the refrigerant in the air conditioning system. Filter Blockage: Sometimes, excessive impurities in the refrigerant and compressor oil can cause the filter screen to become clogged. This reduces cooling efficiency, increases resistance, and decreases the flow of refrigerant to the expansion valve, leading to the air conditioning not cooling. Saturated Dryer Canister: The car's air conditioning system includes a dryer canister, whose main function is to absorb moisture from the refrigerant and prevent excessive moisture from reducing cooling capacity. When the desiccant in the dryer canister becomes saturated, it can no longer filter out moisture.
Recently, my Magotan also experienced air conditioning not cooling, and it took a long time to figure out the root cause. The most common issue is refrigerant leakage, as rubber hoses in older cars are prone to aging and leaking. Another common problem is compressor failure, where a slipping belt or faulty electromagnetic clutch can cause it to stop working. Last time I cleaned the condenser, I found the cooling fins completely clogged with poplar and willow catkins. Also, don’t forget to check the cabin air filter—if it hasn’t been replaced in two years, it’s likely completely blocked, drastically reducing airflow. If the cooling fan isn’t spinning or the temperature sensor fails, the AC system will stop working entirely, and you’ll need a diagnostic tool to check the error codes. I recommend starting with simple fixes like recharging the refrigerant or replacing the filter before taking it to a professional shop for compressor inspection.
From my experience, when a Magotan's air conditioning isn't cooling properly, 80% of the time it's an issue with the refrigerant system. The most common problem is refrigerant leakage in the pipelines, especially in vehicles that have been driven for five or six years - seal aging is inevitable. Once I encountered an even more troublesome issue - an expansion valve blockage where the refrigerant couldn't circulate at all. Another often overlooked situation is frequent compressor cycling, which might be caused by a faulty pressure switch. I've personally replaced a receiver-drier myself, only to find it full of moisture and contaminants. It's worth noting that improper modifications can also cause problems, such as using the wrong type of refrigerant. The inspection sequence is crucial: first check if the compressor belt is loose, then measure the high and low pressure line pressures, and finally troubleshoot any electrical issues.
