What Causes the BMW 525 Passenger Side Air Conditioning to Not Cool?
1 Answers
BMW 525 air conditioning not cooling may be due to too much or too little refrigerant, excessive impurities in the system, or air in the air conditioning refrigeration system. Too much or too little refrigerant: Both excessive or insufficient refrigerant can cause the car air conditioning to not cool properly. Excessive refrigerant usually occurs due to overfilling during maintenance, as the proportion of refrigerant in the air conditioning system must meet specific requirements. If the proportion is too high, it can affect heat dissipation—more heat dissipation means greater cooling capacity, while less heat dissipation results in reduced cooling capacity. Conversely, if the air conditioning system lacks sufficient refrigerant, the amount of refrigerant sprayed into the evaporator from the expansion valve will decrease, leading to less heat absorption during evaporation and consequently reduced cooling capacity. Excessive impurities in the system: If the refrigerant or refrigeration oil contains too many impurities, the filter screen in the system may become clogged, reducing the flow of refrigerant and increasing resistance. This results in less refrigerant reaching the expansion valve, leading to insufficient cooling capacity. Air in the air conditioning refrigeration system: If air enters the air conditioning system, it can cause excessive pressure in the refrigeration pipes and poor refrigerant circulation, also leading to insufficient cooling. This issue typically arises due to degraded sealing of the refrigeration system or incomplete vacuuming during maintenance.
