What are the symptoms of a faulty car air conditioning relay?

1 Answers
SanLola
07/29/25 1:25pm
When a car's air conditioning relay fails, the following symptoms may occur: 1. Faulty vehicle air conditioning relay: The vehicle's air conditioning system fails to start, and the compressor cannot operate. Even if the air conditioning occasionally starts, it will not provide cooling. 2. After power is applied, the refrigeration compressor does not work. When testing the adjustment components, if the relay does not engage, it indicates a relay malfunction. Use a multimeter to check whether the power supply circuit is normal. 3. Causes of relay damage: Poor contact of the relay's contacts (due to high-temperature burning or contamination). 4. If there is virtual soldering or desoldering of the relay's pins, the relay should be re-soldered or replaced immediately.
Was this review help?
9
1
Share
More Forum Discussions

What are the requirements for applying for a motorcycle license?

Motorcycle license application requirements include: 1. Age requirements: For light motorcycle models, applicants must be between 18 and 70 years old; for ordinary three-wheeled motorcycles and ordinary two-wheeled motorcycles, applicants must be between 18 and 60 years old. 2. Physical requirements: (1) Height: Must be at least 150cm tall. (2) Vision: Naked or corrected vision in both eyes must reach at least 4.9 on the logarithmic visual acuity chart. (3) Color vision: No red-green color blindness. (4) Hearing: Able to distinguish the direction of sound with each ear at a distance of 50cm from a tuning fork. (5) Upper and lower limbs: Both thumbs must be intact, and each hand must have at least three other fingers intact with normal movement function; both lower limbs must be intact with normal movement function, and the length difference must not exceed 5cm. (6) Trunk and neck: No movement dysfunction.
8
1
Share

What are the impacts on the owner after a vehicle is forcibly scrapped?

After a vehicle is forcibly scrapped, the owner will face the following impacts: 1. Revocation of driver's license: If the owner is caught driving a scrapped vehicle, they will be fined and have their driver's license revoked. They can only reapply for a motor vehicle driver's license after two years, and will no longer be eligible to obtain Class A or B licenses. 2. Loss of vehicle quota: For vehicles that have been impounded and not processed within three months after public notice, or vehicles that have reached mandatory scrapping standards, the vehicle quota will be forfeited. For owners of key vehicles with multiple unresolved traffic violations, overdue scrapping, or overdue inspections, traffic police departments will lock the vehicle owner and driver's archive information through the "Five Key" vehicle special cleanup campaign (mainly targeting five types of key vehicles including converted non-operational large buses, hazardous goods transport vehicles, large highway buses, large tourist buses, school buses, and vehicles with over 50 unresolved violations).
5
4
Share

What is the trunk size of the Buick GL6?

In its regular state, the trunk has a depth of 300mm, a width of 985mm, and a height of 800mm, with a maximum depth of 1910mm. Below are the detailed specifications: 1. Capacity: Without folding down the third-row seats, the GL6's trunk space is quite limited, suitable only for small items like backpacks. However, with the third-row seats folded down, the trunk space becomes more practical, featuring a flat floor that can accommodate several travel suitcases with ease, meeting the needs of daily family use. Folding down the second-row seats as well transforms the trunk into a completely flat space, ideal for moving large items or even serving as a sleeping area. 2. Overview: The SAIC-GM 2019 Buick GL6 was officially launched on October 8, offering a total of 5 models. The new vehicle comes with an upgraded version of Buick's eConnect connectivity technology and includes certain optimizations in its configurations.
17
0
Share

What Causes Abnormal Noises When a Car Starts at Low Speed?

Abnormal noises when a car starts at low speed are likely related to the engine. The causes of these noises are as follows: 1. Relationship between abnormal noises and engine speed: Most common engine noises depend on the engine's speed state. (1) Noises only occur at idle or low speeds. Possible causes include: excessive clearance between the piston and cylinder wall; overly tight piston pin or connecting rod bearing assembly; excessive clearance between the tappet and its guide hole; wear on the camshaft profile; sometimes, a loose starter clutch causing pulley noise (more noticeable during speed changes). (2) Noise becomes chaotic at a certain speed, with brief sounds during rapid deceleration. Possible causes include: cracked camshaft timing gear or loose fixing nut; broken crankshaft; loose piston pin bushing; excessive axial clearance of the camshaft or loose bushing. (3) Noises appear during rapid acceleration and persist at high speeds. Possible causes include: loose connecting rod bearing, melted or mismatched bearing shell; loose crankshaft bearing or melted bearing shell; broken piston pin; broken crankshaft. 2. Relationship between abnormal noises and load: Many engine noises are closely related to load. Diagnosis can be done by gradually removing load from each cylinder, typically using single or double cylinder cut-off to identify the relationship between noise and load. (1) Noise disappears or reduces when a cylinder is cut off. Possible causes include: piston slap; loose connecting rod bearing; piston ring leakage; broken piston pin. (2) Noise worsens or appears when a cylinder is cut off. Possible causes include: loose piston pin bushing; excessive piston skirt taper; piston pin displacement; severely loose connecting rod bearing cap bolts or melted connecting rod bearing alloy; severely loose flywheel bolts. (3) Noise reduces or disappears when two adjacent cylinders are cut off. Possible causes include: loose crankshaft bearing.
9
4
Share

What are the hidden features of the Buick GL6?

Buick GL6 remote control hidden features include trunk escape channel, etc. Here are the specific introductions: 1. Hidden features: Child safety lock, adjustable seat belt height, rear reading light, remote key window lift, follow-me-home lighting, etc. 2. Design: The Buick GL6 features a winged chrome grille that runs through the headlights, forming a double-layer combined winged LED headlight; floating roof, hidden D-pillar, and unique integrated streamlined windows extending from the A-pillar to the rear, running through the tail, making the overall shape very smooth. The Buick GL6's winged LED daytime running lights adopt Buick's innovative light curtain technology, creating a more layered effect when lit. The 'winged' elements of the LED taillights are interlaced, clearly layered.
13
3
Share

What does tire size 275/35r19 mean?

The first number indicates the width of the tire, usually measured in millimeters. In this case, the tire width is 275mm. The following number represents the aspect ratio of the tire. Below is some relevant information about tires: 1. Tire Introduction: Tires are the only components of a car that come into contact with the ground. Some car owners only replace the tires on the drive wheels when changing tires. For example, some front-wheel-drive car owners only replace the two front tires, while some rear-wheel-drive car owners only replace the two rear tires. In fact, this practice is acceptable. 2. Tire Aging: Tires are made of rubber and will age over time. It is recommended that car owners replace their tires every four years, even if the mileage is low during that period. Tires can also age if left unused for long periods, so it's important to check the production date when purchasing new tires.
17
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.