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Truck AC problems and causes.

With high temperatures in the summer season, AC is essential for staying cool inside of the truck during these months. The air conditioning system of a commercial truck plays a vital role in maintaining the driver’s comfort, especially during long journeys. However, like any other mechanical system, the air conditioning system is susceptible to malfunctions. That’s why the importance of learning to recognize the truck ac problems and causes.

The most common AC problem in medium and heavy-duty trucks is blowing hot air. Several factors, such as a malfunctioning compressor, low refrigerant levels, or a clogged condenser, can cause this problem. A faulty compressor is the most common cause of hot air blowing.

Truck Cooling system

Common truck A/C problems.

- Blowing Hot Air causes:

  • Malfunctioning compressor.

  • Low refrigerant levels.

  • Clogged condenser.

- Weak Airflow causes:

  • A clogged air filter.

  • Malfunctioning blower motor.

  • Faulty AC fan.

- Unusual Noises causes:

  • Worn-out compressor.

  • Faulty blower motor.

  • A loose belt.

- Foul Odors causes:

  • Dirty air filter.

  • Mold or mildew growth.

  • A clogged evaporator drain.

Preventing truck AC problems.

Prevention is always better than cure, and this applies to semi-truck AC problems as well. Regular maintenance can help prevent AC problems and prolong the life of the AC system.

Here are some tips to prevent semi-truck AC issues you can always avoid with a regular preventive maintenance:

  • Change the air filter regularly. A dirty air filter can reduce airflow and produce foul odors.

  • Check the refrigerant levels regularly. Low refrigerant levels can cause hot air to blow.

  • Keep the condenser clean. A clogged condenser can cause hot air to blow.

  • Inspect the compressor, blower motor, and AC fan regularly. Worn-out or faulty components can cause unusual noises and weak airflow.

Problems with the truck AC system can be frustrating and costly. However, it’s very good to learn and understand the common problems and their causes, for you to take the necessary steps to prevent them. As official truck dealers for Isuzu Trucks, Hino Trucks, Volvo Trucks, and Fuso Diesel, we provide a wide variety of cooling and AC system parts for all models. Browse or contact us for the cooling parts of your need.

Regular maintenance is key to preventing AC problems and prolonging the life of the AC and truck electrical system. Contact us, to schedule an AC diagnostic or to simply help you solve any emergency with your truck AC system.


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