What are the reasons for Mazda6's air conditioning not cooling?
2 Answers
Mazda6's air conditioning not cooling reasons: 1. Refrigerant quantity issue: The drying bottle in the car's air conditioning system absorbs moisture and stores some refrigerant. Therefore, when the refrigerant quantity decreases to a certain level, the car's air conditioning cooling capacity will decrease. Some models with heating and cooling air conditioning may blow hot air from the vents if the air conditioning cooling is insufficient. 2. Filter screen issue: Sometimes, if there is too much dirt in the car air conditioning's refrigerant and refrigeration oil, it can clog the filter screen, reducing the cooling effect, increasing resistance, and decreasing the refrigerant flow to the expansion valve, leading to the car air conditioning not cooling. Sometimes, if air enters the car air conditioning system, it will cause excessive pressure in the refrigeration pipe, and poor refrigerant circulation can also lead to insufficient cooling. 3. Compressor, power, voltage issues: Sometimes, the car air conditioning not cooling is due to the compressor's drive belt being too loose, or it may be due to the condenser's heat dissipation capacity decreasing, leading to reduced air conditioning cooling capacity. If the car's power or voltage is too low, the compressor's electric clutch's suction decreases, or there is oil contamination between the electric clutch pressure plate and the belt pulley, it can cause a "slipping" phenomenon similar to a loose drive belt, also leading to the car air conditioning not cooling.
With years of experience in car repair, I've found that the Mazda6's air conditioning failure to cool can stem from various common issues, requiring systematic troubleshooting. First, check if the refrigerant level is sufficient—if low, leaks might occur at hoses or connection points; if the AC pipes feel icy but the air isn't cold enough, a refrigerant top-up is needed. If the compressor makes unusual noises or fails to start, it could indicate bearing damage or belt looseness—listen for sounds in the engine bay when turning on the AC. The fan system is another culprit: clogged front grilles or motor issues can impair heat dissipation, especially noticeable during summer highway drives. Dirty condensers also reduce efficiency, so regular rinsing helps prevent problems. A faulty temperature control switch becomes problematic when lowering the temperature yields no response. Having handled several cases myself, I always advise owners to visit authorized shops for pressure tests and repairs to avoid safety hazards—driving without AC in scorching summers is unbearable.
