Why Does the Temperature Rise When the Air Conditioner is On?
1 Answers
The reasons for high temperature when the air conditioner is turned on are as follows: 1. Check whether the electric fan is working properly: Normally, the electric fan has two gears, one is the low-speed gear, and the other is the high-speed gear. The high-speed gear usually works when the air conditioning pressure is too high or when the engine water temperature reaches 103 degrees Celsius. If the electric fan does not have high speed or the high-speed rotation is insufficient, the above phenomenon will definitely occur. It should be noted that if the electric fan does not have high speed, it may not necessarily be a problem with the electric fan itself. The high-speed fuse of the electric fan is located in the fuse box above the battery. If the fuse is blown, the fuse circuit is not in good contact, the air conditioning high and low pressure switch is damaged, or the fan high-speed relay is damaged, it will cause the electric fan to have no high speed. 2. Check whether the thermostat opening is insufficient: If the thermostat opening is too small at normal temperature, it will cause the engine cooling water circulation speed to slow down, resulting in high water temperature at low speed. 3. Check whether the water pump has an idling phenomenon: The water pump impeller of the Jetta is made of plastic. If the shaft part is cracked, it will cause an idling phenomenon when the water temperature is high, leading to high water temperature.
