Why Does Hot Air Enter the Car When the Air Conditioner Is Off?

1 Answers
Hattie
07/30/25 12:03am
When driving without turning on the air conditioner, hot air may still blow from the vents, but this is actually a normal phenomenon. Specific reasons: The air intake for the air conditioner passes through the engine. When the engine is running, heat is carried by the air to the vents, so even when the air conditioner is off, the air blown out can be hot. Fuel-saving tips for using the car heater: There is a coolant temperature gauge on the car dashboard. When the needle reaches the middle position, you can use the heat generated by the engine to blow warm air into the car; although the car may feel warm when entered before starting, the air quality inside is very poor, and it can cause fogging on the windshield. After starting the vehicle, turn on the external circulation to maintain continuous air exchange inside the car.
Was this review help?
6
4
Share
More Forum Discussions

What is the logo of Lvaida in Volkswagen?

Lavida is the Volkswagen Lavida. The naming of Lavida is quite meaningful, with its English name Lavida being a typical Spanish word meaning life, living, and hope, representing the dynamic vitality of life and a lifestyle full of fun. The Lavida is the first independently developed A-class car by Shanghai Volkswagen, launched in June 2008, and is an important model in Volkswagen's global product strategy. In addition to the Lavida, Shanghai Volkswagen has introduced many models. Currently available models include the Lavida, Tiguan, T-Cross, Passat, Teramont, Phideon, Polo, etc. Volkswagen Lavida: In terms of body dimensions, the Volkswagen Lavida measures 4670mm in length, 1806mm in width, and 1474mm in height, with a wheelbase of 2610mm. The body structure is a 4-door, 5-seat sedan. In terms of appearance, the front face design of the Volkswagen Lavida is significantly different from previous A-class cars under the Volkswagen brand, especially its unique teardrop-shaped headlight design. The traditional Volkswagen family grille and U-shaped front face design are also inherited and enhanced in the Lavida.
4
4
Share

What is the actual fuel consumption of the BMW 325i?

9.6 liters. Additional information: The BMW 325i, as a minor facelift of the new 3 Series, is somewhat conservative, but the detailed changes are generally successful. The inline 6-cylinder 2.5L engine is mature in technology and operates stably. The craftsmanship and materials are impeccable, with no significant changes in styling, and the i-Drive system has been further improved. The handling level of the 3 Series is well-recognized, offering both fun and safety. Although it has single-piston brakes, the braking force is sufficient with the help of electronic assistance systems. The chassis is sturdy and performs very solidly at high speeds. The new 325i still uses BMW's most classic inline 6-cylinder engine, with improved responsiveness and power delivery compared to before. It has a maximum power of 160 kW (218 hp) and a maximum torque of 250 Nm, equipped with Valvetronic variable valve technology. The power delivery starts around 2,500 rpm and continues up to around 6,000 rpm. Its acceleration performance has also been tested, achieving 0-100 km/h in under 8 seconds, and the engine sound heard inside the car during full acceleration is even more exhilarating.
19
3
Share

What do the PRNDS positions represent?

P stands for Parking gear, R represents Reverse gear, N denotes Neutral gear, D indicates Drive gear (forward), and S signifies Sport mode. Below is an introduction to the PRNDS gear positions: 1. P gear: Parking gear, used when parking your vehicle. The P gear automatically locks the engine, functioning similarly to a handbrake. Automatic transmission vehicles must be shifted to P gear to remove the key when turning off the engine, and some push-to-start vehicles also require shifting to P gear for ignition. 2. R gear: Reverse gear, engaged when reversing the vehicle. Typically, shifting to R gear automatically activates the reverse radar or rearview camera if equipped. 3. N gear: Neutral gear, used during brief stops or while waiting at traffic lights. However, the N gear lacks a locking mechanism, meaning the vehicle may still move under external forces such as inertia or on a slope. 4. D gear: Drive gear, the normal driving position for vehicle operation. 5. S gear: Sport mode ("S" is short for "sport"). In S gear sport mode, the transmission can shift freely but delays gear changes, maintaining higher engine RPMs for extended periods. This allows the car to operate at lower gears with higher RPMs, delivering greater torque output and acceleration.
9
0
Share

What is the actual fuel consumption of the Bora?

The fuel consumption of the Bora is 7.7L/100km. Below is a relevant introduction to the all-new Bora: In terms of exterior design: The all-new Bora features strong and flowing lines that outline a more three-dimensional and elegant overall shape. The enlarged grille area makes the front fascia look younger and more dynamic. A sharp silver line, like a blade, runs through the front grille and integrates seamlessly with the winged headlights, adding a finishing touch to the front. Four powerful character lines extend upward from the front grille along the hood, complementing the dynamic and bold front bumper with its reflective fog light design, together creating the all-new Bora's rugged "X"-shaped front face. The aggressive front end, paired with the sharp and dynamic new headlights and dual U-shaped LED daytime running lights, makes the all-new Bora look powerful and ready to go. In terms of dimensions: The all-new Bora measures 4562/1793/1468mm in length, width, and height, with a wheelbase of 2614mm. While the dimensions have increased, the interior layout has become more rationalized. Compared to the previous generation, the actual interior space of the all-new Bora has significantly improved, with front and rear legroom increasing by up to 20mm, providing both drivers and passengers with a more comfortable and spacious environment. In terms of interior: The all-new Bora adopts a simple and symmetrical design style, fully showcasing the premium quality of this A-class family sedan. The ergonomically designed new features include a new center console design, integrated air vent styling, Volkswagen's latest MQB-style multifunction steering wheel, neatly arranged function buttons, and dual-tone seat combinations, all complemented by high-quality materials for a luxurious feel.
4
4
Share

What Causes the Steering Wheel to Make Abnormal Noises in Baojun Vehicles?

Below are the potential locations and reasons for abnormal noises when turning the steering wheel: 1. Turn signal reset sound: If the turn signal is activated while steering, the noise may originate from the rebound clip of the automatic reset mechanism for the turn signal. This requires confirmation by the vehicle owner. If confirmed, it is a normal occurrence. Sometimes, multiple clicks may be heard because the steering column has three automatic reset notches per full rotation. Turning the wheel one full rotation will produce three clicks. 2. Noise from the steering column dust cover: If the noise comes from below the steering wheel, it might be due to the steering column dust cover. Lack of lubrication in the dust cover can cause friction noises. Applying some grease inside the dust cover should eliminate the noise. 3. Noise from inside the steering wheel: If the noise comes from within the steering wheel, it is likely caused by the clock spring (spiral cable) for the airbag. Remove the steering wheel and apply grease to the clock spring. If the noise persists, replace the clock spring as it may be damaged. Handle the steering wheel gently during removal or disconnect the airbag fuse to prevent accidental deployment. 4. Noise from the strut mount bearing: If the noise comes from outside the vehicle, it might be due to insufficient lubrication in the strut mount bearing. Open the hood and listen for noises near the top of the strut mount. If confirmed, apply grease to the bearing. If the noise continues, replacement is necessary. 5. Noise from the stabilizer bar: If the noise is not from the strut, check the stabilizer bar bushings for looseness or damage. Loose or damaged bushings can cause noises not only when steering but also when driving over uneven surfaces. Loose bushings can be fixed by adding shims, while damaged ones must be replaced.
20
3
Share

How to Test the Condition of Spark Plugs?

Spark plugs exhibit the following symptoms when they may be faulty: Difficulty in starting the car, both cold and hot starts are problematic, often requiring multiple attempts. Engine shaking, noticeable vibrations while driving the car. Lack of power, a significant decrease in performance compared to normal conditions. Increased fuel consumption. Stalling issues. Failed exhaust emissions tests. Common causes and diagnosis of spark plug failures: Several common issues can prevent spark plugs from functioning properly: Incorrect spark plug gap adjustment. A gap that is too small limits the contact area between the spark and the air-fuel mixture, and the flame kernel growth is suppressed by the electrode's flame quenching effect, resulting in weak sparks and difficult mixture ignition. Conversely, a gap that is too large may exceed the ignition system's voltage capacity, preventing spark generation. Cracked spark plug skirt. High-voltage current leaks through the crack, preventing sparks at the electrodes. Carbon buildup on electrodes, causing leakage from the center electrode to the surroundings instead of sparking to the side electrode. Excessive carbon deposits can short-circuit the spark plug, preventing sparks and damaging the insulator. Damaged electrodes. Prolonged electrical erosion from sparks or chemical corrosion from combustion gases can cause electrode breakage, preventing spark generation. Low insulation resistance of the spark plug. This reduces the ignition voltage applied to the spark gap, weakening or completely eliminating the spark. Short circuit in high-voltage wires. Leakage in the wire from the ignition coil to the distributor can prevent the entire engine from starting, while leakage in the wire from the distributor to a spark plug can prevent sparking in one cylinder. Burnt platinum contacts. This can prevent all spark plugs from firing, making the engine unable to start or run normally. Faulty spark plugs should be replaced promptly. The replacement steps are as follows: Open the engine hood, remove the plastic cover, and detach the high-voltage wires, marking each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one, ensuring the surrounding area is free of debris like leaves or dust. Insert the new spark plug into the hole, hand-tighten it first, then use the socket to secure it. Reattach the high-voltage wires in the correct firing order and replace the cover. Spark plug replacement interval: Typically, spark plugs should be replaced every 40,000 to 60,000 kilometers under normal maintenance conditions, but this may vary by brand and engine type. Always refer to the vehicle's manual for specific recommendations.
15
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.