7 Reasons Why Your AC Low Side Pressure Is Too High

Woman turning on car air conditioning

If your car’s AC isn’t blowing cold air and your A/C low side pressure is too high, there could be a number of reasons why. We’ll go over some of the most common causes. Keep reading to learn more!

Low Refrigerant Levels

One of the most common reasons for a car AC not blowing cold air is that the refrigerant levels are low. If your car is low on refrigerant, it won’t be able to cool the air effectively. This is usually due to a leak in the system somewhere. To fix this, you’ll need to take your car to a mechanic and have them recharge the system. This is typically a pretty quick and easy fix.

Faulty Compressor

The compressor is responsible for circulating the refrigerant through the system. If it’s not working properly, then your car won’t be able to cool the air effectively. This is usually a pretty serious problem that will require professional repair. Depending on the severity of the problem, repair costs can vary quite a bit.

Faulty Dryer

The dryer is an essential component of any refrigeration system, as its primary purpose is to remove moisture from the refrigerant. With a faulty dryer, the moisture in the refrigerant would lead to lower pressure on the high side and higher pressure on the low side.

Something Is Blocking the Airflow

This could be something as simple as a leaf or piece of trash that has gotten into the vents. Or, it could be something more serious like an issue with the ductwork. If you think there might be something blocking the airflow, you can try checking and cleaning the vents yourself. However, if you’re unsure or if the problem persists, it’s always best to take your car to a mechanic so they can check it out and make sure everything is in working order.

Your Car’s AC System Is Overcharged

If your car’s AC system is overcharged, it can cause the AC’s low side pressure to be too high. This can lead to a number of problems, including reduced cooling capacity and decreased efficiency. Additionally, an overcharged AC system can cause the compressor to overheat, which can damage the compressor and potentially lead to a fire. If you suspect that your AC system is overcharged, it’s important to have it checked by a professional as soon as possible. Otherwise, you could be putting yourself and your passengers at risk.

There Is Blockage In the Condenser

A clogged condenser can lead to an increase in low side pressure. In addition, debris can cause the compressor to overwork, which can also lead to an increase in low side pressure. By regularly checking the condenser and keeping it clean, you can help prevent this issue and keep your car’s AC working properly.

Faulty Evaporator Coils

If your car’s AC isn’t blowing as cold as it used to, one possibility is that the evaporator coils are faulty. The evaporator coils are responsible for absorbing heat from the cabin of the car, and if they’re not working properly, they won’t be able to remove enough heat from the air. This can cause the low side pressure to be too high, which will prevent the AC from blowing cold air.