What are the effects of turning on the cold air without AC?

1 Answers
ThomasRose
07/29/25 8:25pm
The effects of turning on the cold air without AC: Without AC, the air will blow directly from the air vents without being cooled, and over time it will become increasingly hot. To get cold air in the car, the AC switch must be turned on, which activates the compressor to deliver cooled air. Below is an introduction to the working principles of the car's air conditioning system: 1. Cold air working principle: Cold air is formed by compressing the refrigerant to liquefy it and then vaporize it, absorbing a significant amount of heat from the air. When the cold air is turned on, the compressor pulley drives the compressor to work, increasing the engine load and consuming a certain amount of fuel. 2. Warm air working principle: Warm air comes from the heat generated by the engine during operation. After the engine's cooling system dissipates heat from the engine, a fan sends this heat into the car to form warm air.
Was this review help?
4
2
Share
More Forum Discussions

How Often Should a Family Car Undergo Annual Inspection?

According to the 2021 new regulations on vehicle annual inspections, family cars only need to undergo two on-site inspections within 10 years, specifically in the 6th and 8th years. Below are additional details: 1. Small passenger vehicles with 5 seats or fewer: New cars require a license review every two years within the first 6 years. This review does not require an on-site inspection; you only need to bring your vehicle license and a valid compulsory traffic insurance policy to the vehicle management office before the end of the expiration month to get a stamp and receive the annual inspection sticker. 2. Vehicles older than 6 years and passenger vehicles with more than 5 seats: Both require an annual inspection. This inspection requires an on-site test. Before the annual inspection expiration date each year, you must first take your vehicle to an inspection station for testing. Then, bring the inspection report along with your vehicle license and compulsory traffic insurance policy to the vehicle management office window to receive the annual inspection sticker.
3
0
Share

Is It Normal to See Smoke When Opening the Oil Cap?

Seeing smoke when opening the oil cap indicates that your car is burning oil. There are many possible causes for this issue, such as using the wrong type of oil, worn piston rings in the engine, leaking valves, or abnormal wear in the cylinders. Burning oil is not a minor issue and requires immediate inspection and repair. Below are some key points: 1. Piston Ring Failure: Smoke coming out when opening the oil cap at idle indicates poorly fitted or failed piston rings, causing a connection between the combustion chamber and the crankcase. This is often accompanied by 'blue smoke' (oil burning) from the exhaust. To fix this, the piston rings, cylinder gasket, and possibly the valves need to be replaced to ensure the combustion chamber's seal and prevent oil leakage. 2. Engine Oil: Engine oil plays a crucial role not only in ensuring the vehicle's normal operation but also in reflecting certain engine issues. The best way to avoid such problems is to use high-quality, reputable brand engine oil and maintain good maintenance habits.
20
1
Share

Under what circumstances does a car need to add water?

There are three places in a car where water can be added: the radiator, the windshield washer fluid reservoir, and for large vehicles traveling on mountain roads, a water spray device to lower the temperature of the brakes. Reasons for adding water to a car: 1. Poor engine cooling: When the radiator boils over, the engine's cooling is compromised, leading to excessively high temperatures. This causes components to expand, reducing the clearance between parts, and also lowers the viscosity of the engine oil. In such conditions, wear on components accelerates. If not addressed promptly, the engine may suffer severe damage, leading to a major mechanical failure. 2. There are several reasons for a car's radiator to boil over, including: the effects of hot weather; overloaded air conditioning operation and faulty cooling components; and issues with the car's cooling system, such as radiator leaks, insufficient coolant, degraded coolant, or blockages in the coolant circulation system.
14
0
Share

Why Does the Horn Sound When Unlocking a Car with the Key?

The horn sounding when unlocking a car with the key is a feature set by the driver, primarily depending on the car model. Generally, most cars will emit a sound when unlocked with the key, which is due to the car's settings. The main purpose is to allow the driver to identify the direction of the vehicle through the sound, thereby locating its position. Methods to enable the horn sound when locking the car are as follows: Central Control Settings: Configure through the car's central control. Find the "Vehicle Settings" option on the central console, then enter the "Control Page." On the control page, enable "Lock Sound Alert," and the horn will sound once when the car is locked. Key Settings: Configure via the key. If the car key has a mute button, simply press the mute button towards the car to toggle the lock sound alert on or off. ECU Settings Modification: If the car does not have a mute button and cannot be set through the car's system, the only option is to visit a 4S shop and have a technician modify the ECU data.
12
4
Share

What Causes Frequent Rolling Back During Reverse Parking?

The frequent rolling back during reverse parking is generally caused by poor coordination between the clutch and brake. Here are the relevant explanations: 1. Improper operation: Releasing the brake too early leads to insufficient vehicle power, causing the car to roll back, while releasing the brake too slowly can result in engine stalling. Therefore, precise timing in releasing the clutch and brake is essential to effectively prevent rolling back. 2. In driving tests: Reverse parking and hill starts are critical tasks that test a driver's coordination between the clutch and brake. Poor coordination in either can lead to vehicle rollback or stalling. Regarding the coordination of clutch and brake, we can judge the timing of releasing both pedals by listening to the engine sound and feeling the vehicle's vibration. If the vehicle vibrates significantly and shows a tendency to move forward, we can gradually release the brake, then coordinate with releasing the clutch and pressing the accelerator pedal, allowing the vehicle to move forward safely.
20
2
Share

What are the main ingredients of carburetor cleaner?

Carburetor cleaner, its characteristics and preparation method: a. Formula: Methanol 12%, Acetone 10%, Toluene 38%, 200# solvent oil 40%. b. After preparing the above stock solution formula, add the propellant raw material high-pressure propane. The ratio of stock solution to propellant is 6:4. The method involves proportionally preparing the stock solution and filling it into an iron can, then adding and thoroughly mixing the propellant before packaging the final product. The functions of carburetor cleaner are as follows: 1. Cleaning: Effectively removes oil sludge and other contaminants from throttle valves and engine component surfaces; 2. Decarbonization: Effectively eliminates gum deposits and carbon buildup in throttle valves, intake manifolds, and exhaust gas recirculation systems; 3. Penetration: Can be used as a loosening agent; 4. Rust prevention: Spraying on metal surfaces can prevent rust for a certain period; 5. Energy saving: Improves starting performance, enhances acceleration, eliminates idle instability, and reduces emissions.
14
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.