Why does the air conditioning stop cooling after removing the front bumper on a Mondeo?

[NevaehFitz]

First, check whether any plugs were disconnected or certain pipelines were detached during the removal and installation of the front bumper. The air conditioning system at the front of the bumper primarily involves the ambient temperature sensor. Disconnecting its plug will trigger a fault code, causing the air conditioning to temporarily fail. If the high-pressure or low-pressure pipelines of the air conditioning system were disconnected, the system pressure will be abnormal, and it won't function properly. Below is relevant information about automotive air conditioning: 1. Function: It is used to adjust and control the temperature, humidity, air cleanliness, and airflow inside the car cabin to the optimal state, providing passengers with a comfortable environment and reducing travel fatigue; it also creates favorable working conditions for the driver, playing a crucial role in ensuring safe driving as a ventilation device. 2. Classification: Generally includes refrigeration units, heating units, and ventilation devices. This combined system makes full use of the limited space inside the car, featuring a simple structure and ease of operation, making it a popular modern automotive air conditioning system internationally.

[Dante]

I've been repairing cars for years and have encountered many similar issues—sudden loss of AC cooling after removing the front bumper on a Mondeo is most likely due to accidentally damaging the front condenser or related components during disassembly. That area is right behind the front bumper and quite fragile; a slightly forceful tool or movement during removal can cause cracks or loosen pipe connections, leading to refrigerant leaks. Additionally, the fan wiring might get pulled loose or develop poor contact, causing the fan to stop spinning and the compressor to shut down automatically. I recommend not tinkering with it yourself—head back to a professional repair shop and have the technician use a pressure gauge to test for leaks and check electrical connections. Safety first: a malfunctioning AC not only affects comfort but can also pose driving risks in summer, making it not worth the hassle of daily use. Next time you disassemble, remember to handle components gently or use anti-slip pads for protection.