Truck HVAC Systems Repairs
in North Charleston, SC

Maintaining a comfortable and safe cabin environment in heavy-duty trucks is essential, especially in North Charleston, SC's varied climate. Efficient HVAC systems not only ensure driver comfort but also play a crucial role in operational safety. 

Diesel mechanic performing HVAC system repair in North Charleston, SC

How Do I Fix My AC Blowing Warm Air?

If your AC is blowing warm air, start by checking the refrigerant levels as they might be low. Inspect the condenser for blockages or damage, and ensure the compressor is functioning properly. Sometimes, simply replacing a clogged air filter can resolve the issue. However, for complex problems, professional diagnostics and repair are recommended.

Recurrent Signs of HVAC Issues

  • Inconsistent airflow or a noticeable reduction in air pressure can signal blockages or issues with the blower motor.
  • The musty odor emanating from the vents often points to mold or mildew buildup in the system, which requires immediate attention.
  • The inability of the system to produce the desired temperature, be it heating or cooling, suggests potential issues with the thermostat, refrigerant levels, or compressor.
  • An HVAC system may continue to pump cold air into a truck due to a malfunctioning thermostat, a stuck blend door, or low refrigerant levels, all of which can disrupt the system's ability to regulate temperature properly.

Symptoms of a Damaged HVAC

Noisy Operation: Unusual noises like rattling, banging, or hissing from the HVAC system suggest problems such as loose components, a failing compressor, or a refrigerant leak. These noises are often indicative of a need for immediate repair.

Electrical Issues: Electrical problems within the HVAC system can manifest as intermittent or non-functioning controls, blown fuses, or failure to start. These issues often stem from wiring problems or faults in the system's electronic components.

Refrigerant Leak: Refrigerant leaks are a serious concern and can be identified by a hissing sound, ice formation on components, or a noticeable decrease in cooling efficiency. Prompt repair is necessary to prevent damage to the environment and the HVAC system.

Areas We Service

At General Diesel, located in North Charleston, SC, we're proud to extend our expert services beyond our city's bounds. Our skilled team passionately caters to the diverse needs of diesel vehicles throughout Charleston, Dorchester, and Berkeley counties. With a commitment to excellence, we bring unparalleled diesel repair and maintenance to these communities, ensuring every heavy-duty and medium-duty truck performs at its peak, no matter the location.

Book An Appointment Today

Are you facing HVAC issues with your heavy-duty trucks in North Charleston, SC? Whether it's unusual noises, reduced airflow, strange odors, or ineffective temperature control, our skilled team is ready to diagnose and fix any HVAC system problem. Don't let a malfunctioning HVAC system affect your heavy-duty truck's efficiency and driver comfort.

Heavy-Duty Repairs in North Charleston, SC

For reliable heavy-duty repairs, trust General Diesel to keep your trucks safe and compliant. Whether it's advanced troubleshooting, intricate wiring repairs, or system upgrades, General Diesel’s mechanics bring precision and expertise to every task. We understand the importance of minimizing downtime and maximizing performance.

Our Services

For comprehensive diesel truck services trust General Diesel’s skilled mechanics to keep your heavy-duty truck running at peak performance. From our ASC Certified Mechanics to advanced diagnostics and specialized transmission care, we provide a full spectrum of services to meet all your diesel truck needs.

Customer Testimonials

"Nothing but great things to say about Aaron and his company. We always receive the best care with our daycare buses. Communication is always easy and we will continue to use them as long as we possibly can!"

Wonderful Beginnings

"Aaron, thank you for taking the time to help me with my Freightliner Classic. You and Ryan went above and beyond what’s excepted of a service center!"


"I have been taking my truck to these guys since I purchased it 3 years ago and they always do a fantastic job they do not sale your parts or perform work you do not need they will take you into the shop and show you exactly what's going on and they get the job done right every time. Thanks for all you do to keep my truck running right big shout out to Aaron good guy."


"Been dealing with these guys for a few years and no matter what's the issue they find the problem and get it right, the staff is always nice and easy to work with."


"Fantastic service and customer service. The technicians are very knowledgeable in their field as a Diesel Mechanic. The parts department is just as great. If part is not on hand, the parts department can get it in timely manner."


"I work for a company with 5 diesel vehicles. aaron and the crew at general diesel keep our trucks moving. great communication and always satisfied."


Great experience with General Diesel?

Contact Us

Get in touch to find out how we can help you or to schedule your vehicle in for a service.