Browse

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

What Causes the Squeaking Noise When Turning on the Car Air Conditioner?

2 Answers

MacElizabeth

07/25/25 9:29pm

The reasons why a car makes a squeaking noise when turning on the air conditioner are: 1. Damaged compressor belt tensioner pulley; 2. Excessive wear or damage to the blower motor; 3. Faulty internal/external circulation motor; 4. High pressure in the air conditioning system; 5. Incomplete engagement of the compressor clutch; 6. Prolonged non-replacement of the air filter. Solutions for the squeaking noise when turning on the car air conditioner: 1. Clean the air vents promptly; 2. Remove the fan blades, lubricate them, and clear any foreign objects; 3. Replace the blower motor; 4. Replace the air filter. The working principle of a car air conditioner is: The compressor sucks in low-temperature, low-pressure refrigerant gas from the evaporator outlet and compresses it into high-temperature, high-pressure gas before discharging it.

Was this review help?

8

3

Share

SanCarson

08/11/25 10:19pm

The air conditioner makes a squeaking noise when turned on. I've encountered many similar situations over the years of driving. Usually, it's because the air conditioning compressor belt is loose or worn out. When the compressor starts, the load increases significantly, and the belt slipping and friction will produce noise. If the belt is severely worn or cracked, the friction sound will be more noticeable. Another possibility is that there is a foreign object stuck in the fan or blower, such as leaves or dust, causing a squeaking sound when rotating. Aging compressor bearings or insufficient refrigerant can also cause noise. The problem should not be underestimated, as loud noises may indicate that the belt is about to break, affecting driving safety. It is recommended to go to a professional repair shop as soon as possible to check the belt tension and component condition, and replace the parts if necessary. Don't ignore small noises; fixing them early can avoid major problems and save some fuel costs.

Was this review help?

19

2

Share

Expand All

More Forum Discussions

What Are the Causes of Excessive Engine Noise?

Engine noise can be attributed to several factors: 1. Combustion noise. In gasoline engines, abnormal combustion phenomena such as detonation and surface ignition can produce significant combustion noise. In diesel engines, the rapid rise in combustion chamber pressure causes vibrations in engine components, leading to noise. Generally, diesel engines are noisier than gasoline engines. 2. Mechanical noise generated during engine operation. This primarily includes piston slap noise and valve mechanical noise. If there is a gap between the piston and the cylinder liner during operation, and the gas pressure acting on the piston causes strong impacts against the cylinder wall, piston slap noise occurs. 3. Valve mechanical noise mainly stems from gear transmission noise, which results from the impact and friction between gear teeth during meshing. Additionally, torsional vibrations of the crankshaft can disrupt normal gear meshing, thereby generating noise.

What type of engine oil is suitable for the new Alto?

It is recommended to use 5W-30 for the new Alto, as this is the optimal oil viscosity recommended in the Alto's manual. It provides quieter engine performance, better fuel efficiency, and is also cost-effective. Below is some relevant information about engine oil: 1. Engine oil, also known as engine lubricant, is referred to as the 'blood' of a car. It serves multiple functions such as lubrication, cleaning, cooling, sealing, wear reduction, rust prevention, and corrosion protection for the engine. 2. The engine is the heart of a car, containing many metal surfaces that move against each other under high friction. These components operate at high speeds, in harsh environments, and can reach working temperatures of 400°C to 600°C. Under such extreme conditions, only qualified lubricants can reduce engine component wear and extend the engine's lifespan.

Why is water leaking from the bottom of the car?

Here are the reasons for water dripping from the car chassis: 1. Condensation water generated during the use of the air conditioning system; 2. Failure of the radiator cooling system; 3. Windshield washer fluid dripping. Methods to prevent car water leakage are as follows: 1. Close the sunroof when exiting the vehicle; 2. Check the installation position of the car sunroof; 3. Inspect whether the car sunroof sealing strip is aged; 4. Check if the car water collection tray is leaking; 5. Examine the car sunroof drainage hose. Additional information: Reasons for water dripping from other parts of the car Water dripping from the rear exhaust pipe: This is caused by carbon dioxide and water vapor formed during complete combustion of gasoline; Water dripping from the car body: This is a normal phenomenon after rain or car washing.

Is Wheel Balancing Necessary When Replacing a Tire?

In general, wheel balancing is required whenever the tire system (tire or wheel rim) has been replaced or repaired. Additionally, for some vehicles that have been in use for an extended period, the "wheel balancing weights" may fall off, leading to an imbalance in the tire's weight distribution. In such cases, wheel balancing is necessary. Below is some relevant information about wheel balancing: 1. Wheel balancing involves correcting the balance of the wheel configuration by adding different weights at various positions, ensuring that the car tires operate in a concentric motion. This makes driving at high speeds smoother and safer. 2. Issues with wheel balancing typically become apparent only during high-speed rotation. If wheel balancing is not performed, it can cause vibrations during high-speed driving. If the front wheels are not properly balanced, the tires may wobble side to side at high speeds, leading to steering wheel vibrations. In severe cases, this can cause numbness in the palms. If the rear wheels are unbalanced, high-speed driving can result in body sway, posing safety risks. If all four wheels are unbalanced, the entire vehicle may experience more intense vibrations than usual during driving.

How to Clean Carbon Deposits in the Car Throttle Body?

Here are the detailed steps for cleaning carbon deposits in the throttle body: 1. Remove the air filter. 2. Move the throttle lever to open the throttle valve. 3. Spray throttle cleaner into the throttle valve multiple times. 4. Use a toothbrush to repeatedly scrub the inner walls of the throttle body. 5. Wipe off the cleaner inside the throttle body with a tissue to complete the cleaning. Here are the symptoms of excessive carbon deposits in the car throttle body: 1. Difficulty starting the engine when cold, but normal when warm. 2. Unstable engine idle speed, fluctuating up and down. 3. Poor acceleration when revving, with a noticeable sluggish feeling. 4. Reduced driving power, especially noticeable during overtaking, with slow acceleration response and inability to achieve the car's original power. 5. Exhaust fumes are irritating to the eyes and nose, severely exceeding standards. 6. Increased fuel consumption compared to before.

What is the detection method for the throttle position sensor?

Here are the detection methods for the throttle position sensor: 1. Check the power supply voltage: Unplug the connector from the throttle position sensor, turn on the ignition switch, and measure the voltage between Vcc and the idle contact, as well as between Vcc and the full throttle contact. The voltage should be between 4.5-5.5V. If it does not meet the requirement, check the ECU connection circuit. If the voltage is within the required range, proceed to check the throttle potentiometer resistance. 2. Check the resistance: Unplug the throttle potentiometer connector and measure the resistance between Vcc and the idle contact, which should be 1.5~2.6kΩ. Then measure the resistance between Vcc and VTH; at idle, this value should be 0.75~1.3kΩ. Slowly rotate the throttle lever to the full open position, at which point the potentiometer resistance should rise to a maximum of 3.6kΩ. If any of these values do not meet the specified range, it indicates a fault in the throttle position sensor, and the sensor should be replaced.

Trending Ranking

What Causes EGR Valve Failure?

What is the fuel tank capacity of the 3008 in liters?

How to troubleshoot P0342 fault code?

What is the minimum ground clearance of the BMW X3?

How often should a vehicle be inspected after six years?

Which country is GAC Trumpchi from?

What Happens If a Car Exceeds the Recommended Maintenance Mileage?

Reasons for Difficulty in Starting a Car

What are the pros and cons of the auto start-stop function in cars?

Does an Automatic Transmission Car Have Idle Speed When Reversing?

More Forum Discussions

What Causes the Squeaking Sound When Turning the Car?

What is the best mileage interval for car maintenance?

What are the symptoms of a faulty EGR valve?

How to Deal with Valve Tapping Noise?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.