truck hvac

Common Issues with Truck HVAC and How to Fix Them

Semi-trucks are crucial links in the transportation industry chain. It is as important to ensure driver comfort and convenience as it is to maintain your fleet in its top condition. So, it is important to ensure that every semi truck hvac system in your fleet is well-maintained and fixed in time if an issue arises.

Semi trucks are typically associated with long journeys. This essentially increases the importance of quickly restoring driver comfort.

The knowledge of common issues and truck ac repair needs can help you address this important factor. Here are 3 issues that commonly occur with truck AC systems.

1. Hot Air

This is the most common semi truck air conditioner problem. There are many underlying problems that can cause your truck’s AC to blow hot air. These include:

  • Low refrigerant level
  • Problematic compressor
  • Clogged condenser

When the refrigerant levels become low, your vehicle’s AC system can no longer generate cold air. This is often caused due to refrigerant leaks. If a compressor failure occurs, the refrigerant stops circulating through the system, creating hot air. When the condenser gets clogged, it can no longer remove heat from the refrigerant.

2. Bad Odor

If you notice a foul smell from your truck air conditioner, you should not take things lightly. Some of the common factors that can cause this problem include:

  • Dirty air filters
  • Clogged evaporator drains
  • Mold and mildew

When an air filter becomes dirty, dust and debris can get trapped, creating a persistent foul smell. When the evaporator drain gets clogged, it can no longer remove moisture from the air during cooling. Thus, moisture can build up and create the perfect conditions for producing a foul smell.

Your semi truck air conditioner has the perfect conditions within and around it for mold or mildew growth. The conditions are typically dark and damp. Sometimes, these conditions can work together to cause mold or mild growth, creating a musty smell. The presence of mold and mildew should be immediately addressed to prevent contamination.

3. Significant Decline in Airflow

Weak airflow is also a common problem requiring professional vehicle AC repair. This issue is often caused by:

  • A faulty blower motor
  • Clogged air filters
  • Malfunctioning AC fan

When the blower motor stops working properly, it can no longer force an adequate amount of air through the AC and into the cabin. Once the air filter gets clogged by dust and debris, it can result in a significant decline in airflow. The AC fan is responsible for pulling air from the condenser and cooling the refrigerant.

Fixing Common Semi Truck Air Conditioner Issues

If your semi truck ac unit stops working due to one of the above-mentioned reasons, a number of steps can be taken to identify the cause. If the problems are minor, you may be able to fix them. However, more complex issues require the services of a professional truck repair shop.

Check for Signs of Leaks

If there is fluid present under your truck, it may be due to refrigerant leakage from the truck hvac unit. It is recommended to check the hoses regularly. The hose fittings should be tightened to prevent any chances of leaks. A technician can conduct a dye test to determine where a leak can occur. Technicians usually fix leaks by replacing damaged parts or hoses.

Check for Signs of Debris Buildup

If a truck air conditioner is giving trouble, you should check its evaporator coils, air filters, and other areas where debris is likely to build up within the AC system. 

Ensure Timely System Maintenance

It is recommended to schedule regular semi truck ac unit maintenance. This helps in keeping your AC system in good condition while ensuring minimal downtime in driver comfort. Scheduled maintenance is an important part of business operations in truck fleet management. Including your vehicle’s air conditioning system in this process can also contribute to optimizing productivity.

Regular maintenance allows technicians to identify problems and carry out timely truck ac repair before major and costly repairs or replacements are required.

So, it is recommended to follow these tips to take care of your truck hvac system. For more information and assistance, it is recommended to contact TMS TruckMasters at (514) 631-0963 in Montreal, at (450) 645-0404 in Boucherville, or at (450) 455-2578 in Vaudreuil-Dorion.