What are the troubleshooting of car air conditioners?- Taizhou Kelong Plastic Mould Co., Ltd.

1. Replace the battery in the car thermostat. It may sound silly, but even new batteries can sometimes fail. If the heat pump starts working, you've solved your problem.

2. Test the override switch. Open the lid of the Auto Engine Coolant Thermostat Housing Assembly. It should pull open with just a few plastic snaps on the top or bottom. Under the lid, there will be an override switch. This directly bypasses all the electronics in the thermostat, which manually completes the circuit for the heat pump to run when you press it. If the heat pump runs when the override switch is pressed, the engine electrical thermostat assembly is broken and needs to be replaced. If it doesn't run when you push, you'll have to go to the actual unit itself, which will be outside your house.

3. Remove the cover of the external unit. On the outside unit, you have to remove the cover, so use a screwdriver to find the screws that hold it in place, most likely near the ground, there are about eight or a dozen. Turn them counterclockwise to let them go. Pull the lid straight up.

4. Clean the heat pump coil. Use your broom to lightly brush away the coils and remove any debris around them.

Process Analysis of BMW B48 TU Series Engine

The rapid development of automotive engine technology calls for better and better engine cooling systems. The BMW Group has adopted the newly developed stepped-cooling control technology for its new generation of B48 TU engines.

Stepped-cooling Control System

Stepped-cooling control system adjusts the flow rate of different engine cooling circuits connected to the thermal management module (replacing the electronic thermostat) by controling the position of stepped-cooling valves according to the operating status of the engine. This function allows more precise and efficient adjustment according to the engine's operating status, reducing energy loss, lowering fuel consumption and extending engine life.

Structure of Stepped-cooling Control System

The engine employs a stepped-cooling control system, the main components of which are a thermal management module and a chamber with a rotary slide valve. The thermal management module is a new type of electric thermostat that replaces the traditional electronic thermostat.