What are the symptoms of an undercharged AC system?

Keeping this in consideration, how do I know if my AC is low on refrigerant?

Signs Your AC is Low on Refrigerant

1. Increased electric bills. If you're AC system has a refrigerant issue, it'll have to work harder and run longer to keep your house at the set temperature.
2. Indoor temperature isn't comfortable.
3. Ice buildup on the outside unit.
4. Hissing noise is noticeable.

Similarly, what happens if AC is low on Freon? Your AC evaporator coil will send the refrigerant through this line and if the Freon is low, the coils get too cold and causes a cold liquid refrigerant to flow through the line. What happens then is that surrounding moisture that is on the refrigerant line will freeze up.

Additionally, what are the symptoms of an overcharged AC system?

In summary, there are seven symptoms or telltale signs of a system that has too much refrigerant.

• High discharge temp.
• High subcooling in the condenser.
• High pressures in the condenser.
• Higher condenser splits.
• Normal-to-high evaporator pressures.
• Normal superheats.
• High compression ratio.

What happens if refrigerant pressure is too low?

Low refrigerant means low pressure and low pressure means low temperatures that will eventually freeze something called an evaporator coil. When the evaporator coil freezes, cold liquid refrigerant flows through the refrigerant line, causing the surrounding moisture in the air to freeze.