The AC system in your car could go through all sorts of problems. One typical issue is the unit not blowing cold air, which could be punishing in hot weather.
There could be several causes leading to this condition including compressor issues, low-level of refrigerant, trouble with the heater or AC controls, and others.
One symptom indicating a complication in the air conditioning is AC low side high, high side low pressure.
7 Reasons Why Your AC Low Side Pressure Is Too High
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.
#1. 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.
#2. 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.
#3. 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.
#4. 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.
#5. 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.
#6. There Is a 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.
#7. 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.
Repair Cost:
Replacing the evaporator coil can resolve the issue, but costs can range from $850 to $1100 depending on the car’s model and mechanic’s hourly rates.
Overcharged AC systems can cause excessive heat and pressure, leading to hot air blowing out of the vent.
A mechanic can fix these issues using a device that discharges or bleeds excess refrigerant from the AC, monitoring pressure levels and ensuring the system has adequate refrigerant.
Damaged condenser fans can also cause issues, with replacement costs ranging from $300 to $425, labor costs from $55 to $200, and parts from $245 to $330.