What Causes High Water Temperature When the Air Conditioner is On in Wuling Sunshine?

[DaisyMarie]

Here are the specific reasons for high water temperature when the air conditioner is on in Wuling Sunshine: 1. Insufficient Coolant: Coolant leakage or low coolant level can cause the engine water temperature to rise. In this case, check the coolant level and top it up if necessary. Recheck after a few days to see if the level drops significantly, and locate any leaks if present. 2. Cooling Fan Malfunction: When the vehicle is running at high speed, the generated heat cannot be effectively transferred to the coolant, affecting heat dissipation and leading to increased coolant temperature, which may cause boiling. 3. Water Pump Failure: Common water pump issues include seized bearings and damaged impellers. Seized bearings are rare, while damaged impellers, such as cracks or detachment from the pump shaft, can slow down coolant circulation, often resulting in engine overheating. 4. Thermostat Failure: The thermostat automatically adjusts the flow of coolant into the radiator based on temperature, altering the coolant's circulation range to regulate the cooling system's efficiency and ensure the engine operates within the optimal temperature range. A faulty thermostat may prevent the cooling system from entering a full circulation mode, leading to increased water temperature.

[VanRafael]

I've experienced several instances where the water temperature of my Wuling Zhiguang soared when the air conditioning was turned on. Primarily, turning on the AC increases the engine's load, akin to adding heavy work, and if the cooling system can't keep up, it's prone to overheating. The core issue lies in the insufficient efficiency of the cooling system—such as slow radiator fan speed or aging blades, which prevents hot air from dissipating; if the thermostat gets stuck in the closed position, the hot water circulation is obstructed, leading to rapid temperature rise. Additionally, insufficient coolant or sludge clogging the radiator can impair heat dissipation. The extra load from the AC compressor forces the engine to work harder, causing the water temperature to spike. It's advisable to regularly check the coolant level, replace aging components in time, and avoid prolonged use of the AC in traffic during hot weather. If a problem arises, don't push it—stop the car, turn off the engine to cool down, and visit a repair shop to replace the fan or clean the radiator.