Why does the Audi Q3 fan keep running even when the water temperature is not high?
2 Answers
Audi Q3 fan keeps running even when the water temperature is not high, which is a normal situation. The following is a related introduction to car air conditioning: 1. Air conditioning layout: Different types of air conditioning systems have different layout methods. Currently, integrated heating and cooling air conditioning systems are widely used in passenger cars. The layout form involves assembling the evaporator, heater radiator, centrifugal blower, control mechanism, etc., together, which is called the air conditioning unit assembly. 2. Air conditioning composition: Modern air conditioning systems consist of refrigeration systems, heating systems, ventilation and air purification devices, and control systems. Car air conditioning generally mainly consists of a compressor, an electronically controlled clutch, a condenser, an evaporator, an expansion valve, a receiver-drier, pipelines, a condenser fan, a vacuum solenoid valve, an idle speed device, and a control system. Car air conditioning is divided into high-pressure pipelines and low-pressure pipelines. The high-pressure side includes the compressor output side, high-pressure pipelines, the condenser, the receiver-drier, and the liquid pipeline; the low-pressure side includes the evaporator, accumulator, return pipeline, compressor input side, and compressor oil sump.
As a loyal Audi Q3 owner, I encountered a similar situation last summer. The fan kept buzzing non-stop, but the temperature gauge remained steady with no changes, which was really frustrating. After inspection, it turned out the temperature sensor was faulty, sending false high-temperature signals to the vehicle's computer, causing the fan to run excessively. Additionally, if the AC is on, the fan also works for the condenser. I tried turning off the AC, but the fan kept running, confirming it was a system malfunction. Don’t underestimate this issue—constant fan operation drains the battery, and if it dies, you might be stranded. Back then, I went to the dealership to replace the sensor, which cost a few hundred bucks to fix. I recommend checking the dashboard warning lights before starting the car; if any flash, it indicates stored error codes. Audi’s electronic systems are complex, and delaying repairs could damage other components like the alternator. Get a professional diagnosis early to avoid bigger expenses.
