What happen if you add too much refrigerant in the car cooling system?

Adding too much refrigerant to a car's cooling system can lead to increased pressure, which may cause the compressor to overheat and fail. It can also result in poor cooling performance, as the system may not be able to effectively circulate the refrigerant. Additionally, excessive refrigerant can cause damage to various components, including hoses and seals, potentially leading to leaks. It's crucial to maintain the proper refrigerant level for optimal system performance.