Browse
For Sale
Antiques CollectiblesApparelBaby Kids ItemsBooks， Movies And MusicElectronicsFree StuffGarden OutdoorHealth BeautyHome GoodsHome Improvement SuppliesMusical InstrumentsOffice SuppliesPet SuppliesSporting GoodsTicketToys GamesTransportationOthers
Jobs
AccountingAdministration & Office SupportAdvertising， Arts & MediaBanking & Financial ServicesCall Center & Customer ServiceCEO & General ManagementCommunity Services & DevelopmentConstructionConsulting & StrategyDesign & ArchitectureEducation & TrainingEngineeringFarming， Animals & ConservationGovernment & DefenseHealthcare & MedicalHospitality & TourismHuman Resources & RecruitmentInformation & Communication TechnologyInsuranceLegalManufacturing， Transport & LogisticsMarketing & CommunicationsMining， Resources & EnergyReal Estate & PropertyRetail & Consumer ProductsSalesScience & TechnologySelf EmploymentSport & RecreationTrades & ServicesOther
Property
BuyRent
Cars
Used CarsNew CarsOthers
Services
BusinessCraftsDesign And WebEventsHome ImprovementLegalLessonsPersonalPetsPhotographyRepair And Technical SupportWellnessWriting， Translation， And TranscriptionOthers
Community
Activities & GroupsArtists & MusiciansClasses & LessonsEventsFriendship & NetworkingLost & FoundRideshareSports TeamsVolunteersTravel & Travel PartnersSkills & Language SwapOther

What Causes the Car AC to Not Cool at Idle Speed?

1 Answers
Austin
07/29/25 7:01pm
When the car AC does not cool at idle speed, it could be due to issues such as a faulty AC compressor, loose or broken AC belt, clogged radiator, or insufficient power at idle. Idle speed refers to the operating condition of the engine when it is running in neutral gear. The engine speed at idle is called the idle speed. Faulty AC Compressor: If the pressure between the AC compressor and the expansion valve fails to reach 150Kp to 200Kpa, the refrigerant inside the system cannot circulate properly. As a result, the AC will not cool at idle speed. The expansion valve cannot generate high pressure (below 150Kpa), and the evaporator cannot cool, leading to insufficient cooling at idle. Loose or Broken AC Belt: If the drive belt is too loose, it may slip, accelerating wear and failing to transmit power. This results in insufficient power at idle, leading to weaker cooling. Additionally, if the condenser is too dirty or clogged with dust, it may fail to cool effectively. Clogged Radiator: A poorly functioning external cooling system will lead to inadequate heat dissipation at idle, causing the AC to not cool properly. Other issues may include a faulty blower fan, internal noise, poor motor operation, or insufficient airflow. Solutions for AC Not Cooling at Idle: If the AC compressor is faulty, it should be repaired at a 4S shop. Additionally, check if the AC compressor pulley rotates smoothly—if not, it may need replacement. Inspect the AC cooling system and ensure the fan is working. Clean the condenser and replace the AC filter.
Was this review help?
7
3
Share
More Forum Discussions

What is the proper way to use a left-turn waiting area?

According to the rules of the left-turn waiting area, when the straight-through traffic light is green and the left-turn signal is still red, left-turning vehicles must also cross the pedestrian crosswalk and enter the left-turn waiting area. They should wait until the left-turn signal turns green before making the turn. This is the proper way to use a left-turn waiting area. The functions of the left-turn waiting area are as follows: The primary benefit of setting up a left-turn waiting area is to increase the capacity of left-turn lanes at intersections, reduce the waiting time for drivers passing through the intersection, and improve the intersection's traffic efficiency. However, drivers should be reminded that the left-turn waiting line is not a "stop line." If both the straight-through and left-turn signals are red, all vehicles must wait at the previous stop line.
10
4
Share

Is Starting in Third Gear with a Manual Transmission Bad for the Car?

Starting a car in third gear is theoretically possible, but the likelihood of stalling is quite high, and it's practically very difficult to execute. Essentially, only drivers unfamiliar with cars would attempt to start in third gear, as starting requires more precise coordination between the clutch, throttle, and brake. Often, the car stalls before the clutch even reaches the semi-engaged point. Starting a manual transmission car in third gear causes significant wear on the clutch plates. The semi-engaged state of the clutch lasts longer, and the semi-engagement point is harder to find. It is not recommended for users to start in third gear. Important Notes: 1. To start, press the clutch with your left foot, shift left and up from neutral into first gear, press the brake with your right foot, and slowly release the clutch to find the semi-engagement point (you'll feel the car vibrate slightly). Release the brake to start moving. Once the car has moved a few meters, gradually release the clutch completely, then move your left foot away and place your right foot on the throttle to gently accelerate. 2. When the speed exceeds 10 mph, release the throttle with your right foot, press the clutch with your left foot, and shift into second gear by pushing the gear lever left and down with your right hand. Then, slowly release the clutch and move your left foot away, placing your right foot on the throttle to accelerate based on road conditions. 3. When the speed exceeds 30 mph, shift into third gear. The same steps apply: release the throttle with your right foot, press the clutch with your left foot, shift into neutral by pushing the gear lever right and up, then directly up into third gear. If the speed is above 40 mph, you can shift from neutral directly down into fourth gear. 4. Downshifting follows the same principle—reduce speed to the appropriate range before shifting down.
6
3
Share

What Causes Steering Wheel Shaking When Driving Fast

If the car only shakes when driving, it may be caused by an issue with the wheel dynamic balance. In such cases, it is recommended to visit a professional tire shop to perform a dynamic balance test on each wheel. If the wheel dynamic balance is normal, it is advisable to check the engine and transmission. High-speed rotating components in a car require dynamic balance testing, and wheels are no exception. A wheel consists of a rim and a tire. During manufacturing, neither the tire nor the rim has uniform weight distribution across all parts. After the tire is mounted on the rim, the weight distribution of the wheel is still uneven. When the wheel rotates at high speed, this can cause abnormal shaking. Therefore, wheels need dynamic balancing. During a dynamic balance test, the wheel is mounted on a specialized machine, which rotates the wheel and detects where counterweights need to be added and how much weight is required. After testing, the technician installs balance weights at the appropriate locations. It is recommended to perform a dynamic balance test on each wheel after installing new tires to prevent abnormal shaking at high speeds. If abnormal shaking occurs during high-speed driving, it can affect the car's stability and handling. Steering wheel shaking when driving fast If the steering wheel shakes when driving fast, first check whether the tire pressure of the front and rear wheels is normal. If the tire pressure is normal, the issue is likely related to the car's dynamic balance, and a four-wheel alignment may be required. Possible causes of steering wheel shaking when driving fast: poor tire dynamic balance, deformed wheel rims, faulty half-shaft dynamic balance, damaged half-shaft bearing, or deformed wheel hub.
13
5
Share

How is a car battery charged?

Car batteries are charged by the alternator. The time required to fully charge a 12V battery depends on various factors such as the remaining battery charge, engine speed, and current power consumption. To extend the battery's service life, here are some relevant details about car batteries: 1. Car Battery: A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. 2. Car Battery Maintenance: (1) Avoid frequent vehicle starts. In winter, when the car is difficult to start, do not attempt continuous starts. Continuous starting will definitely cause the battery to over-discharge and become damaged. The interval between restarts should exceed 5 seconds. (2) When the battery has been in use for about two and a half years, routine maintenance should include battery testing as a preventive measure. Try to avoid using electrical devices such as the CD player or cigarette lighter when the vehicle is not running, and minimize the use of various onboard electrical devices while driving.
17
1
Share

What to Do About Abnormal ETC Deductions?

For abnormal ETC deductions, the first step is to call the ETC customer service hotline for assistance. You can also report the issue to toll station staff. Generally, the system records vehicle entry and exit data, making abnormal ETC deductions unlikely. In cases of duplicate ETC charges, visit a highway service office or ETC service outlet to file a dispute. Fill out an application form to request a fee recalculation, and the bank will refund any overcharged amount to your account within the stipulated time. Regarding missed ETC exit scans, vehicles intentionally evading tolls will be added to the ETC blacklist, barred from nationwide highway access, and charged based on the longest possible route distance. However, tolls can be paid retroactively through manual lanes. If blacklisting occurs due to insufficient ETC card balance, the restriction will be lifted within 24 hours after recharge.
3
4
Share

Who to Call for Help When a Car Tire Blows Out on the Road?

You can call the 4S store for rescue. If the distance is far, you can request assistance from a professional car rescue agency. 1. Preventing tire blowouts: As temperatures rise, the likelihood of a tire blowout increases. Therefore, it is essential to check the tire pressure beforehand, fasten the seatbelt, and drive cautiously. Not only should tire pressure be carefully monitored, but tire temperature should also not be overlooked, especially during hot weather in summer or during long drives. 2. Handling a tire blowout: (1) When it is determined that the front tire has blown out: First, firmly grip the steering wheel, remember not to adjust the direction abruptly, wait until the direction stabilizes, then gradually apply the brakes to slow down the vehicle, gently steer the wheel to pull over, and set up a triangular warning sign approximately 100-200 meters behind the car. (2) When the rear tire blows out: The vehicle's tendency to veer off course will be less pronounced. In this case, ease off the accelerator, gently apply the brakes, maintain control of the steering, slowly pull over to the side, and set up a triangular warning sign approximately 100-200 meters behind the car.
13
5
Share
Trending Ranking
Which generation of GTR is the most classic
How Long Should You Warm Up Your Car Before Driving?
What are the reasons for different colored warning lights?
4
Can a new car run continuously for 1000 kilometers?
5
What is the symbol for brake fluid?
6
What to Do When You Realize You're Driving the Wrong Way on the Highway?
7
How to Obtain a Driving Instructor License?
8
How Long After Starting the Car Can You Turn on the Air Conditioning?
9
Is it normal for a BMW to occasionally stall at a red light?
10
Should You Press the Clutch or the Brake First When Decelerating?
More Forum Discussions

Why is the car battery dead?

3
2
0

What is the difference between a single and dual exhaust pipe on a car?

5
1
0

What Are the Car Models in Fast & Furious 7?

13
1
0

Where is the windshield washer button located in the car?

16
1
0
About Us
Terms of Use
Privacy Policy
Help
Contact Us
FAQ
Cookie
Cookie Policy
Cookie Settings
© 2025 Servanan International Pte. Ltd.