What Are the Symptoms of a Faulty Car Air Conditioning Thermostat Switch?

1 Answers
VonDavid
08/27/25 5:33am
Car air conditioning thermostat switch failure can lead to intermittent cooling, no cooling at all, or insufficient cooling from the car air conditioning system. Below is a partial introduction to the car air conditioning thermostat switch: 1. The car air conditioning thermostat switch has a temperature probe attached to the evaporator, primarily to prevent ice blockage caused by evaporator freezing. If the car air conditioning thermostat switch is faulty, the air conditioning will continue to cool, causing the evaporator to freeze. Once the evaporator freezes, cold air cannot be blown out through the vents. 2. Under normal conditions, the two wires of the car air conditioning thermostat switch form a closed circuit. The thermostat switch has a temperature probe attached to the evaporator to prevent ice blockage and loss of airflow. When the surface temperature of the evaporator drops to a certain level (usually set at 3 degrees Celsius), the two wires form an open circuit, causing the compressor to stop operating, and the evaporator temperature will no longer decrease.
Was this review help?
10
2
Share
More Forum Discussions

Why does the halogen light cover turn yellow?

The yellowing of the light cover is not due to oxidation, but rather because the material batch number or specification of the selected yellowing cover does not meet the requirements for UV resistance. Here are some repair methods: Mirror Restoration In daily maintenance, you can wash the headlights with soap and water every three months to prevent the accumulation of dirt and avoid yellowing. After cleaning, polish the headlights with a chemically synthesized polishing agent and follow the procedure to wax and protect them. When the car is not in use, park it in a garage or a shaded area. This will help reduce the oxidation of polycarbonate caused by UV exposure to the headlights. Replacing the Headlight Assembly The daytime running light design of this car has a defect. The LED is too close to the light guide strip, and the high temperature of the LED causes the end of the light guide strip to melt. You can go to a 4S shop to replace the car assembly.
19
2
Share

What does engine power misrepresentation mean for domestic cars?

Engine power misrepresentation refers to the situation where the power rating labeled on the engine is significantly higher than the actual power output obtained through standardized national testing. In simple terms, the actual power of the engine falls far short of the labeled power value, and such labeling is termed as misrepresentation. For consumers: Misrepresentation is purely deceptive and irresponsible. Engines with misrepresented power ratings are generally produced by obscure manufacturers that lack legal oversight, resulting in unguaranteed engine quality and after-sales service. Hazards of misrepresentation: Misrepresentation serves merely as a means for unscrupulous businesses to seek exorbitant profits. Its existence not only disrupts the healthy development of the automotive engine market and undermines the establishment of domestic brands but also severely harms consumer interests.
4
1
Share

What are the common sports car brands?

Common sports car brands include: Ferrari, Maserati, Pagani, Mercedes-Benz, Porsche, Maybach, BMW, Audi, Ford Mustang, Dodge, Cadillac, Honda, Toyota, Mitsubishi, Subaru, etc. Introduction to sports cars: Sports cars mainly refer to high-performance vehicles with low chassis, streamlined design, and outstanding power. Their most distinctive feature is the relentless pursuit of speed. According to the body structure, sports cars can be divided into coupes, convertible sports cars, and two-door sports cars. Types of sports cars: The first type is hot hatchbacks, the second is small sports cars, the third is American muscle cars, and the fourth is convertible sports cars.
2
1
Share

What Causes the Engagement Impact Noise When Starting with a Dual-Clutch Transmission?

It is normal for a dual-clutch transmission to produce metallic impact sounds under certain conditions. The following details the reasons for abnormal noises during the start-up of a dual-clutch transmission: Gear Shift Fork Noise: During the gear shifting process of a dual-clutch transmission, the final gear selection is completed by the shift fork, which can easily generate abnormal noises when operating. Additionally, the clutch assembly may also produce noises during the shifting process. Many car brands experience this phenomenon: Currently, many domestic brands using dual-clutch transmissions also encounter varying degrees of abnormal noises, although significant improvements have been made.
2
5
Share

Is a tire pressure of 230kpa normal for cars in summer?

Is a tire pressure of 230kpa normal for cars in summer? A tire pressure of 230kpa is normal for cars in summer. According to the international GBT2978-2008 standard, the standard tire pressure for regular tires is 240-250kpa. Due to high temperatures in summer, the lower limit of the standard tire pressure is generally considered the normal range. However, if the car is often parked outdoors, the tire pressure can usually be about 100kpa lower than the standard. Therefore, a tire pressure of 230kpa in summer is normal. There are generally three reasons for abnormal tire pressure: Abnormal tire pressure: Usually, an alarm will trigger if the pressure is below 180kpa or above 300kpa. At this time, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset in time, the tire pressure monitoring system will still record the original data, causing the tire pressure monitoring indicator to light up. In this case, simply perform a tire pressure reset. Damaged tire pressure sensor: The tire pressure sensor, which is used to monitor tire pressure, is directly installed inside the tire and connected to the tire inflation port. If the tire pressure sensor is damaged during driving, the tire pressure warning light will also illuminate. For sensor damage issues, only replacement with a new component is possible.
12
1
Share

What's the reason for engine warning light and air conditioning not cooling?

Reasons for engine warning light and air conditioning not cooling: lack of refrigerant, dirty condenser. Detailed explanations of the reasons: Lack of refrigerant: Car air conditioners generally require refrigerant replenishment every 2-3 years, with some vehicles needing it annually. Even with excellent sealing, refrigerant can still escape, especially if there are minor leaks in the air conditioning pipes or condenser. Dirty condenser: During summer when poor air conditioning performance is noticed, testing may show no issues with the system and normal high/low pressure readings. When visiting a 4S shop for repairs, mechanics often recommend cleaning the radiator. The primary purpose of cleaning the radiator and condenser is to improve heat dissipation.
2
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.