What is the method to reset the maintenance light on the Volkswagen Lavida?

Do you need to turn on the AC when using the car air conditioner in summer?

When using the car air conditioner to blow cold air, it is essential to turn on the A/C switch. Otherwise, only the blower in the car air conditioner will be working, and the air coming out of the vents will be at normal temperature. The A/C switch in the car is the air conditioning switch, which essentially controls the compressor. By turning the A/C switch on or off, you can control the operation of the car air conditioning refrigeration system. Here are some relevant details: 1. Definition of car AC: The car air conditioning AC is the compressor switch, simply put, it is what delivers cold air. The car air conditioning system includes not just the compressor but also components like the condenser, evaporator, and expansion valve. However, the compressor is one of the most critical components of the refrigeration system, responsible for compressing and transporting refrigerant vapor. 2. How to turn on cold air in a car: First, press the A/C switch; when the A/C light turns on, it indicates that the air conditioning refrigeration has started working. Next, press the recirculation button to cut off the exchange of air between the cabin and the outside. Then, rotate the temperature control knob to adjust the desired interior temperature. 3. Whether to turn off the A/C switch in winter: Actually, it doesn't matter whether you turn it off or not. In extremely cold northern regions where temperatures are near or below freezing, even if the A/C switch is turned on, the car air conditioning refrigeration system will not operate. However, one advantage of turning on the A/C switch in winter is that it helps dehumidify the air, preventing the car windshield from fogging up and obstructing the driver's view.

14

4

Share

What Causes the Hissing Sound Like Air Leakage When the Car Air Conditioner is On?

Car air conditioner making unusual hissing sound when AC is turned on can be caused by the following reasons: Belt Slippage: The air conditioner compressor is driven by the engine crankshaft via a belt. If the belt becomes loose, aged, severely worn, or if the tensioner lacks sufficient tension, it can cause the belt to slip, resulting in a hissing sound. Air Conditioner Compressor Failure: When the AC switch is turned on, the air conditioner compressor starts operating. If the compressor is damaged (e.g., due to abnormal clutch operation), it may produce a hissing sound. Foreign Objects in the Air Duct: If there are foreign objects in the air conditioning system's duct, they may rotate with the blower's airflow and repeatedly hit the air filter, causing a hissing sound. Solutions for air conditioner noise: Belt Slippage: If the issue is caused by the belt, simply replace the belt. If the problem lies with the tensioner, replace the tensioner. Compressor Failure: Currently, both 4S shops and repair shops opt for direct replacement when dealing with compressor failures. Foreign Objects in the Air Duct: If there are foreign objects in the duct, remove the air filter and carefully inspect and clean any foreign objects inside the duct.

20

2

Share

What is Kontrol tire?

Kontrol is not a tire brand, but a Hankook Tire technology. The initial 'k' in Kontrol comes from the English word 'Kinetic', representing the concept of perfect integration between the vehicle, the driver, and the road. All Hankook tires are based on the fundamental philosophy of Kontrol technology, striving to excel in performance, comfort, and safety while being more environmentally friendly, providing consumers with a pleasant driving experience. The four major functions of Kontrol technology: 1. Performance: Enhances tire performance, improves durability, and maintains good handling even in harsh driving conditions, allowing drivers to control the vehicle effortlessly in various driving situations. 2. Safety: Ensures the vehicle maintains its performance capabilities during driving, especially in adverse weather and road conditions, thereby safeguarding the vehicle and the driver. 3. Comfort: A deeper understanding of tire behavior in real-world driving conditions forms the basis of tire design, minimizing noise, vibration, and the impact of harsh road conditions to achieve an optimized driving experience. 4. Environment: By improving fuel efficiency, it reduces costs for consumers. At the same time, increased fuel efficiency leads to lower vehicle carbon emissions, thereby reducing negative environmental impacts.

14

4

Share

What happens if you fill a car designed for 92 octane with 95 octane gasoline?

95 octane gasoline has a higher octane rating compared to 92 octane, providing better anti-knock properties, which results in fewer engine knocks, quieter operation, and potentially improved engine power and reduced fuel consumption. However, since engines designed for 92 octane typically have lower compression ratios, they may not fully utilize the characteristics of 95 octane gasoline. This could lead to insufficient compression and incomplete combustion of the gasoline, potentially causing sluggish acceleration during driving. Additionally, 95 octane gasoline is relatively more expensive. Below are some related points: 1. Meaning of gasoline grades: The grade of gasoline represents its octane rating. The higher the grade, the higher the octane rating, indicating better anti-knock properties. In reality, the gasoline grade has no relation to the cleanliness of the fuel. 2. Misconceptions about high-grade gasoline: Many people believe that higher-grade gasoline is better, providing stronger engine power and better cleaning effects. However, this is incorrect. Using gasoline with an excessively high grade not only offers no benefits to the engine but may also cause adverse effects and is simply a waste of money. For example, incomplete combustion may more easily lead to carbon deposits. 3. It's also not advisable to fill a car designed for 95 octane with 92 octane: Similarly, if the manufacturer specifies a minimum requirement of 95 octane but 92 octane is used instead, the lower fuel grade may cause knocking and detonation, resulting in reduced power output.

14

0

Share

Does idling with the air conditioning on affect the engine?

Running the air conditioning while the car is idling has a slight impact on the engine, as it can lead to carbon buildup, particularly around the exhaust pipe tailpipe, and increases fuel consumption. Although idling with the air conditioning on does not cause significant harm to the car, it is advisable to minimize such situations. Precautions for using the car air conditioning: 1. Do not turn on the air conditioning immediately after starting the car: First, open the doors and windows, activate the external circulation to release the accumulated hot air inside the car. Once the interior and exterior temperatures are similar, close the doors and windows, turn on the air conditioning, and switch to internal circulation. This not only lubricates the engine but also improves the cooling efficiency of the air conditioning. 2. Avoid using the air conditioning during prolonged traffic jams or waiting: If the air conditioning is left on during extended periods of idling, the engine remains in an idle state, which places a heavy burden on it. Additionally, incomplete combustion of gasoline at idle produces high concentrations of carbon monoxide. If the surrounding air circulation is poor (e.g., in a garage), the carbon monoxide from the exhaust can enter the car, posing a risk of poisoning to the occupants. 3. Do not set the temperature too low: The ideal temperature for the car air conditioning is around 25°C. If there are elderly or children in the car, it is best not to set it below 27°C. Also, consider the external temperature: the difference between the interior and exterior temperatures should generally not exceed 5–6°C. 4. Do not keep the internal circulation on continuously: When first turning on the air conditioning, it is best to use external circulation. After the temperature has dropped, switch to internal circulation, and periodically alternate between internal and external circulation. 5. Avoid direct airflow from the vents: When using the cold air setting, direct the airflow upward to promote convection between the hot and cold air inside the car. This helps cool the car more quickly and enhances comfort for the occupants.

7

3

Share

What is the appropriate tire pressure for a Corolla 1.2T?

The normal tire pressure range for a Corolla 1.2T is 2.4-2.5 bar. Due to seasonal factors, the tire pressure can be appropriately increased by 0.2 bar in winter and reduced by 0.1 bar in summer. This data is based on the international GBT2978-2008 standard. The Corolla 1.2T's tire pressure monitoring system is indirect, utilizing the vehicle's ABS balance control. It only displays low pressure when there is a leak. To check the tire pressure, first prepare a tire pressure gauge, locate the original tire pressure label, press the gauge onto the tire valve to measure and read the value, and remember to replace the valve cap after measurement. Generally, a tire pressure above 2.8 bar is considered too high, while a pressure below 2.0 bar is too low. Hazards of over-inflation: Reduced tire friction and adhesion, affecting braking performance; causes steering wheel vibration and deviation, reducing driving comfort; accelerates wear on the central tread pattern, shortening tire lifespan; increases vehicle vibration, indirectly affecting the lifespan of other components; overstretches tire cords, reducing elasticity and increasing the load on the vehicle during driving. Hazards of under-inflation: Increased friction coefficient with the road surface, leading to higher fuel consumption; makes the steering wheel heavy and prone to deviation, compromising driving safety; increases movement of tire parts, causing abnormal heat due to excessive rolling; weakens cord and rubber functions, leading to delamination or cord breakage and excessive friction with the rim, damaging the bead area and causing abnormal wear; multiplies friction between the tire and ground, sharply raising tire temperature, softening the tire, and drastically reducing strength. High-speed driving may result in a tire blowout. If the tire pressure monitoring indicator light comes on (a yellow symbol with an irregular circle, no stamp on top, four small spikes below, and an exclamation mark inside), it is generally due to one of the following three reasons: Abnormal tire pressure: Typically, it alerts when pressure is below 1.8 bar or above 3.0 bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset promptly, the system continues to record the previous data, causing the indicator light to stay on. Simply reset the tire pressure to resolve this. Damaged tire pressure sensor: The sensor, installed inside the tire and connected to the inflation valve, monitors tire pressure. If the sensor is damaged due to impact while driving, the tire pressure warning light will illuminate. For sensor damage, replacement with a new part is the only solution.

17

5

Share

What is the method to reset the maintenance light on the Volkswagen Lavida?

Do you need to turn on the AC when using the car air conditioner in summer?

What Causes the Hissing Sound Like Air Leakage When the Car Air Conditioner is On?

What is Kontrol tire?

What happens if you fill a car designed for 92 octane with 95 octane gasoline?

Does idling with the air conditioning on affect the engine?

What is the appropriate tire pressure for a Corolla 1.2T?

How to Restore Electronic Parking System Failure?

Which subject needs to be retaken for drunk driving?

What is the actual fuel consumption of the 2020 W5?

What does the Auto button on a car mean?