Dual high pressure in car air conditioning is caused by excessive refrigerant. Below are the specific causes and solutions for dual high pressure in car air conditioning: 1. Specific causes of dual high pressure in car air conditioning: 1. Excessive refrigerant, air entering the refrigeration system, or insufficient cooling due to condenser failure can all lead to dual high pressure in car air conditioning. 2. When both high and low pressures are higher than normal, it is referred to as "dual high." Common faults usually involve air in the system or excessive refrigerant, which can be resolved by re-evacuating and adding refrigerant. Another scenario is poor heat dissipation, especially when the ambient temperature is high, often leading to worse heat dissipation. This fault is generally caused by clogged or dirty heat dissipation fins, or insufficient fan speed. 3. When both high and low pressures are lower than normal, it is referred to as "dual low." There are two possibilities: one is a system blockage, where the blockage causes throttling, resulting in a noticeable temperature difference at the throttling point. The other possibility is refrigerant leakage, leading to insufficient refrigerant. 2. Solutions for dual high pressure in car air conditioning: 1. Reduce the refrigerant slightly. 2. Re-evacuate and add refrigerant, ensuring the evacuation time is no less than 30 minutes. 3. Use touch to identify the leakage point and either repair or replace the faulty component.
