Easy Ways to Care for Your Vehicle’s A/C System

HVAC stands for heating, ventilation, and air conditioning. A properly functioning car A/C system depends on the following components: 

• The compressor, the heart of the system, pressurizes and circulates the refrigerant. 
• The condenser removes heat from the refrigerant. 
• The evaporator cools the cabin air by absorbing its heat. 
• The flow restrictor, either an expansion valve or an orifice tube, regulates refrigerant flow. 
• The receiver-drier, also known as an accumulator, filters moisture and contaminants from the refrigerant. 

Your cabin’s cool, clean air depends on all components working together. Proper A/C system care can be achieved easily through a few key maintenance practices. Follow these 10 tips to get started. 

It might seem counterintuitive, but running your car’s A/C for 10 minutes a week in winter helps keep the system functioning, prevents seals from drying, and maintains proper pressure within the compressor. It also guarantees the system’s continued lubrication and operation. 

You can achieve better in-car air quality with a clean cabin air filter. A clogged cabin air filter leads to restricted airflow and decreased HVAC efficiency. 

Change your HVAC filter annually or every 20,000 to 30,000 kilometres. The schedule may change based on driving conditions (weather, traffic, vehicle type) and the manufacturer’s instructions. 

Infrequent operation of your air conditioner may result in the growth of mould and bacteria, but avoid using ordinary household cleaners. 

Avoid spraying cleaning products directly on air conditioning components. A/C systems have electrical sensors that can short circuit or corrode. Trapped liquid in the ductwork or evaporator can cause improper evaporation, leading to moisture buildup and mould growth—exactly what you’re trying to prevent. 

In situations like this, car cleaning formulas can be a real help. Choose a heavy-duty formula that effectively eliminates mould, mildew, and bacteria, proving useful in cleaning air conditioner vents and various surfaces. 

To effectively clean your A/C, use appropriate cleaners on accessible plastic surfaces and foaming A/C cleaners designed for HVAC systems for deeper cleaning, particularly on the evaporator coil. 

There are usually warning signs before your car’s air conditioning fails. Keep an eye out for these symptoms: 

• warm or weak airflow, even when set to max cold 
• unusual noises like rattling when the a/c is on 
• moisture or leaks inside the cabin 
• strange odours, which can indicate mould in the vents 
• the A/C compressor clutch not engaging 
• any general deterioration in the system 

Early detection of these issues can save you money on future A/C service. 

For peak efficiency, service your A/C every two years: 

• Check refrigerant levels. 
• Inspect the car A/C compressor and belt. 
• Clean the condenser and evaporator. 
• Check all hoses and seals. 
• Replace the HVAC filters. 

A pressure test is also part of the bi-annual service. It helps diagnose leaks in the system. However, it requires a special pump, and only advanced DIYers should consider conducting it. 

For any step in the regular service you’re unsure of, have a technician at your nearest AUTOPRO service centre complete the process. 

Debris, including leaves, insects, and dirt, can easily accumulate in front of the radiator and obstruct your car’s condenser. Your car’s air conditioning won’t cool effectively if the condenser fails to dissipate heat properly. 

A soft brush and low-pressure water are recommended for cleaning the condenser. For optimal airflow and efficiency, treat the fins with care. A rust-penetrant lubricant can free up stubborn bolts and brackets. 

Too much moisture will cause mould and a musty odour. At the end of your journey, switch to the fan instead of the air conditioner. This drying process eliminates moisture in the evaporator and ducts, preventing mould and mildew growth. 

In hot weather, it’s best to avoid immediately using maximum air conditioning after starting your vehicle. Instead, open all doors and even the trunk to air out the vehicle first. Then slowly turn up the A/C and close doors from the front to the back. This reduces the strain on your car’s A/C compressor, resulting in better cooling. 

Direct sunlight can overheat the cabin, placing a heavy burden on the car’s air conditioning. Park in the shade or use a sunshade for your windshield. 

If your car’s air conditioner isn’t blowing as cold as it used to, you might need more refrigerant. Refrigerant loss isn’t always caused by a leak; your system can experience natural refrigerant depletion over time. 

The solution to this problem is a recharge. However, we do not recommend conducting this on your own. Working with refrigerant comes with hazards that can harm not only you, but those around you. 

Among all the features of your car, the air conditioning system is easily underappreciated until it stops working. 

If you’re looking for specialized tips on A/C maintenance tailored to your car, visit your local NAPA Auto Parts store to chat with one of our experts.