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Why Is My Truck Air Conditioner Not Working?

It’s a nightmare for all truck drivers to be trapped in a tin-can-like taxi without air conditioning on a hot summer day. Therefore, if the vehicle’s air conditioner is not cold, immediate action should be taken to diagnose and fix the problem.


The 5 most common truck AC unit issues are:

(1) Refrigerant leakage

(2) Blocked condenser

(3) Broken condenser

(4) Faulty cooling fans

(5) Bad compressor


1. Refrigerant Leakage


Refrigerant leakage is the first and most important issue affecting AC cooling capacity. The most common place to find leaks is the hose connection of the air conditioner. Oil can collect around these ports, which can be the cause of the leak. You can use sealant to fix leaky joints. However, it can be difficult to pinpoint the location of a leak, as any part of the air conditioner can leak refrigerant. If you do not know the exact location, it is advisable to consult a professional technician.


2. Condenser Blockage


Condensers, an important part of the air conditioning system, are used to compress and cool hot refrigerants. Since the condenser is located outside the cab, dirt on the road can block the condenser. This quickly causes the truck’s air conditioner to malfunction and release hot air. At the same time, it’s easy to visually see if something is blocking the condenser, and cleaning the condenser can easily solve the problem.

3. The Condenser Broken


If you check the capacitor and see that nothing is blocking it,  it can be bad. If a visual inspection finds a hole or damage in the capacitor, the only way to fix the problem is to replace the defective one with a new one.


4. Cooling Fans Malfunction


Cracks in the fan can be due to dirt on the road. If the fan is not working properly, the condenser may not be working properly because it has not cooled properly. The best way to check if a fan is defective is also a visual inspection, and replacing the fan is the only true way to solve this problem. Other common cooling fan issues include blown fuses and other electrical issues.


5. The Compressor Breakdown


The compressor powers your air conditioner. If the compressor breaks, the air conditioner will stop working. The most common reason for compressor malfunction is to not use it for long periods of time. If you restart the AC system after a long time, you may get an electric shock and it may break down. As the old saying goes, unsharpened knives will rust. To counter this situation, you can run the AC system every three weeks for about 15 minutes. Not only does this help keep the compressor fresh and functional, but it also extends the overall life of the compressor.

Kingclima is a professional vehicle cooling solution provider. We offer refrigeration unit and air conditioner for trucks, vans, trailers, and RVs. Being a leading manufacturer of vehicle referigeration unit and AC unit, Kingclima has dived into the industry for 20 years. Trucst Kingclima, follow the market trend, make perfect cooling solution.
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