In 2004, the water temperature of automatic Jetta idling air conditioner was too high.

Turn on the air conditioner, the idle speed is unstable, the low-speed acceleration is poor, and it is easy to turn off the fire-this is a fault:

The throttle idle motor is faulty and needs to be replaced.

The problem of high water temperature-

There are basically two kinds of faults in the cooling system.

First, high temperature failure;

The second is poor heat dissipation.

Let's be specific.

Let's talk about high temperature first. Under normal driving conditions, the temperature inside the car will basically be around 94 degrees. If it exceeds 100 degrees, it can basically be determined as high temperature. There are many reasons.

Let's have a brief check first. Whether the cooling liquid is sufficient, whether the circulating water is normal, and whether the quality of the cooling liquid is up to standard.

The small circulating water pipes of some cars are easily blocked, which leads to water cut-off.

Not easy to find. Some thermostats can't be turned on normally or can't be turned on at all. Insufficient water guide of water pump, impeller slipping and falling off, and bearing stuck.

The cylinder gasket is burnt out and gas escapes, resulting in compressed gas entering the water channel or cylinder head corrosion. When repairing a car, the gap between the piston and the cylinder, and the gap between the piston ring and the cylinder is too small, this kind of fault will also occur.

Poor heat dissipation. The inside and outside of the water tank are not clean, and there are dirt and sundries, which affect the heat transfer.

There is too much scale in the water channel of cylinder. The cooling fan is not turned on on time, and the air ring cover is lost or damaged. The fan blades are installed in opposite directions. The electronic fan control system is out of order and can't provide signals on time.

Other influential parts are poor exhaust system and incorrect ignition time.

Here, talk about the problem of antifreeze. Non-original antifreeze, if the quality is not good, its boiling point is too low, and the water temperature has not reached 100 degrees, it has already boiled. It is recommended to use original high-quality antifreeze.

Insufficient wind power at the air outlet-check whether the pneumatic flap controlling internal and external circulation is closed and in the internal circulation position.

Poor refrigeration effect-whether the refrigerant is enough. Whether the hot and cold switch has been set in place. Whether the surface of evaporation box is dirty.