Freon Check / Replacement (A/C Service)

Refrigerant is the “lifeblood” of your air conditioning system – without it, the system simply cannot function. This chemical substance is responsible for transferring heat, allowing the air conditioner to effectively refresh and cool the air. Over time, the refrigerant level naturally decreases, and a low amount means reduced efficiency, increased energy consumption, and potential damage to valuable system components.

Regular check-ups help detect any suspicious changes early. Signs of low refrigerant include weak cooling, ice formation on air ducts, unusual noises, and higher electricity bills. Ignoring these symptoms can lead to compressor damage, which is costly to repair.

Air conditioning system problems often begin with a drop in pressure or a decrease in refrigerant level. There are three main signs indicating that your vehicle’s air conditioning system should be inspected:

• The air conditioner blows warm air

• The compressor is not functioning properly

• Coolant leakage

Blowing warm air
If the air conditioner delivers warm instead of cool air, this is a clear sign of malfunction. Without refrigerant – the chemical coolant – it’s impossible to produce cool air in the cabin. In such cases, CarB’s specialists first check the refrigerant level and system pressure.

Compressor issues
Some compressors are equipped with a magnetic clutch that produces a distinctive clicking sound when activated, along with noticeable changes in engine performance. If the refrigerant level is too low, the pressure sensor will prevent the compressor from engaging to avoid damage from running dry.

Refrigerant leakage
Refrigerant operates in both high- and low-pressure stages within the system. Before it turns into liquid form under high pressure, it circulates as gas in the low-pressure section. Over time, leaks can develop, which is one of the main indicators of low refrigerant levels. Leakage is usually visible as a thin, oily residue that may appear under the compressor housing, inside the cabin, or beneath the vehicle.

The importance of the cabin air filter
For optimal performance, an air conditioning system needs not only refrigerant refilling but also periodic cabin air filter replacement. This ensures fresh, pleasant air, eliminates unpleasant odors, and protects your health. Dust and bacteria that accumulate in the AC system can cause allergies and asthma. Additionally, the concentration of harmful substances inside a closed cabin can be up to 10 times higher than outdoors. CarB recommends replacing the cabin air filter during every oil change to keep your vehicle’s air clean and safe.