Why is the Citroen C4L air conditioning not cooling?

[Lincoln]

Citroen C4L air conditioning not cooling is due to lack of refrigerant. Here is a detailed introduction to the Citroen C4L: 1. Interior: The overall design of the Citroen C4L is relatively simple, adopting a carbon fiber imitation style. The inverted D-shaped leather multifunction steering wheel integrates rich functions. The center console design is practical and simple, with clearly and practically arranged operation buttons. High-end models are equipped with a large touchscreen LCD display. 2. Powertrain: The Citroen C4L is equipped with two engines, a 1.6T and a 1.6L. Among them, the new generation 1.6THP turbocharged direct injection engine has won international engine awards for 8 consecutive years, with a maximum power output of 123 kilowatts.

[LaDamian]

A few days ago, my friend's car had the same issue—the Citroën C4L's AC suddenly started blowing hot air. After taking it to a repair shop, they found that the compressor electromagnetic clutch was faulty. The mechanic explained that this part acts like the AC switch; if it fails to engage, the cooling function won't start. They also checked the refrigerant pressure gauge, and the reading was within the normal range, ruling out a lack of refrigerant. I recommend you quickly check whether the compressor is working—the compressor pulley should rotate when the AC is turned on at idle. Also, a friendly reminder: such electronic component failures are especially common during hot summer days, so it's best not to attempt DIY repairs and instead seek professional service for safety.

[Joel]

Last year, my C4L also had an issue where the AC only blew air without cooling. After checking myself, I found the cabin air filter was clogged like cotton candy, but replacing it didn’t help. Later, I discovered the condenser fins were completely covered with willow catkins and dead insects. After rinsing them off with a pressure washer, the AC worked again. Now, I make sure to clean the radiator grille every time I wash the car—it’s like the outdoor unit of an AC; if it’s clogged with dust, heat can’t dissipate, the refrigerant temperature won’t drop, and the AC won’t perform well. If you frequently drive on highways, your car is more likely to pick up debris, so try rinsing the front radiator first.

[LeviFitz]

AC not cooling? Most likely due to refrigerant leakage or compressor failure. I've handled several C4L cases where leaks commonly occur at the high/low pressure pipe seals - aging rubber components cause slow leaks. A quick diagnostic method: Start the engine and run AC for 5 minutes, then touch the silver metal pipe (high-pressure line) in the engine bay. If it's warm or not hot at all, there's a 90% chance the refrigerant has leaked out. A broken compressor belt shows similar symptoms - pop the hood to check belt tension. Prolonged neglect can damage the receiver-drier, adding at least several hundred to repair costs.

[DiGideon]

From my experience, first check these four aspects: refrigerant pressure, circuit fuses, AC filter, and temperature sensor. Last week, I helped a neighbor fix the AC issue on their C4L. Using a diagnostic tool, we found abnormal readings from the air vent temperature sensor. If this sensor falsely reports temperatures above 30°C, the AC will reduce its cooling power. We also discovered oxidation and poor contact in the AC fan control box connector—a quick spray of rust remover fixed it. These minor issues are often overlooked. I recommend buying a bottle of contact cleaner to clean the AC panel and fan connectors yourself.