Amarok A/C Failure: Compressor and Sensor Issues Fix

I had a similar issue with my 2020 Tiguan, sounds exactly like what happened to my A/C system. Based on some experience working on VW HVAC systems, this is often related to electrical issues rather than mechanical problems with the A/C compressor itself. In my case, the undervoltage in the vehicle was causing the pressure switch to register incorrect readings, which made the system shut down as a safety measure. The workshop diagnosed it by checking the electrical system first, then testing the A/C pressure switch and compressor operation. The total repair came to 240€, which included: Electrical system diagnostic, Pressure switch replacement, System pressure test, Refrigerant level check The fix resolved both the A/C issue and the warning light. The compressor started engaging normally again and cold air returned immediately. To help troubleshoot your specific case, could you share: Are you getting any specific error codes? Does the fan still blow air, just not cold? Have you noticed any other electrical issues like dim lights or slow starter? When exactly did the problem start occurring? Did you notice any unusual noises before the system stopped working?

Last service was at 73202km and I can confirm what you described matches my current situation exactly. The AC relay and electrical components were checked at a local shop but they could not find any voltage issues. The fan still blows air but nothing cold comes through the HVAC system. The compressor remains completely disengaged. Just had the refrigerant level tested and it shows critically low, which explains why the pressure switch might have triggered the shutdown. No other electrical problems noticed and no strange sounds before it stopped working. It just gradually got less cold over a week until it stopped completely. After reading your experience, I will have them check for potential leaks in the A/C system since low refrigerant seems the most likely cause. This would explain both the warning light and the safety shutdown.

Yes, I know exactly what you mean about it gradually losing cooling, that was a key sign for me too. After getting my Tiguan fixed, I learned that gradual loss of cooling performance followed by complete shutdown is a classic symptom of refrigerant leaks in the A/C system. Since your refrigerant test showed critically low levels and the A/C compressor stays disengaged, its important to find the leak source before just recharging the system. Common leak points in these models include: A/C line connections and seals, Condenser unit, Evaporator core, Compressor shaft seal The good news is leak detection and repair usually costs between 300-500€ including refrigerant recharge, depending on the leak location. The pressure sensor shuts off the system to protect the A/C compressor from damage when refrigerant gets too low. My suggestion would be to have a certified shop perform: 1. UV dye test to locate the exact leak point 2. System component pressure testing 3. Full repair of the leaking component 4. Vacuum test to verify the fix 5. Proper refrigerant recharge This should resolve both the warning light and restore proper cooling function. Just make sure they check the relay switch and pressure sensor operation after the repair since those can sometimes get stuck in safety mode.

Thank you for the detailed information. Knowing that a refrigerant leak is likely causing my A/C system problems helps narrow down the repair focus. The gradual cooling loss pattern matches exactly what happened with my vehicle. I will schedule an appointment to have the complete diagnostic and repair work done, including the UV dye test to locate the leak. Good to know the repair cost range of 300-500€ for fixing a refrigerant leak and recharging the system. I will make sure they test the pressure switch and relay switch after repairs since you mentioned they can remain in safety mode. Will also have them verify all electrical components are functioning correctly once the system is recharged. Just hoping its a simple seal or connection leak rather than a major component issue. At least now I can go into the repair shop with a better understanding of the likely problem and expected costs. Will report back on what they find after the repair.