An air conditioning system that no longer blows cold air is annoying. In the Peugeot 5008, a faulty air conditioning compressor is rarely the whole story. In many cases, the cause lies with an electrical problem or low refrigerant pressure. Sometimes a wear-prone component such as the condenser is to blame. The Peugeot 5008 has a clear pattern in this respect that owners and mechanics recognise. Read on to find out exactly what goes wrong, what it costs and how you can test the system yourself.
Why is the Peugeot 5008 air conditioning not blowing cold air?
If the air conditioning blows warm or inconsistent air, there can be several causes. It is tempting to immediately assume a broken compressor. However, that is not always justified. In the Peugeot 5008, there are a number of common causes. Owners and mechanics come across these regularly.
The most commonly reported causes at a glance:
- Low voltage or a faulty connection in the wiring harness leading to the compressor
- A software block by the ECU (the car’s central control unit), for example caused by a minor engine fault
- A faulty magnetic clutch, the component that mechanically switches the compressor on and off
- A faulty control valve inside the compressor itself
- Refrigerant leakage, causing the pressure in the system to drop too low
- Wear or corrosion caused by moisture in the compressor
What stands out is that in several cases the compressor itself is perfectly fine. It simply does not engage. That can be because the ECU actively blocks the air conditioning due to another fault code. It may also be that too little electrical voltage is reaching the compressor plug. A proper diagnosis is therefore the first step, not an immediate replacement.
‘ Continuing to drive with a damaged compressor can lead to further damage, for example to the condenser or the expansion valve. ’
Compressor and condenser wear out faster than expected
The compressor and the condenser are the two parts of the air conditioning system most prone to wear, the complete set of components that provides cooled air in the cabin. The compressor ensures that the refrigerant is circulated. The condenser is a kind of radiator at the front of the car. It then cools the refrigerant down. If these components are damaged or contaminated, cooling performance drops quickly.
In the Peugeot 5008, some owners report that the compressor starts making noise or cooling intermittently. Squealing, clicking or scraping are signs you should not ignore. Driving on with a damaged compressor can lead to further damage, for example to the condenser or the expansion valve. The expansion valve is the component that regulates the flow of refrigerant through the system. Therefore, have this checked quickly as soon as you hear unusual noises.
Moisture and corrosion as a recurring problem
Moisture in the air conditioning system is a well-known culprit in the 5008. If moisture gets into the refrigerant circuit, it can lead to corrosion of the compressor and fault messages such as a traction or air conditioning fault on the dashboard. A dryer filter in the system normally captures moisture. If it is not replaced for too long, it loses its effectiveness. Having the refrigerant level and the condition of the dryer filter checked regularly prevents more serious damage in many cases.
How do you test the Peugeot 5008 air conditioning compressor?
You do not need to be a mechanic to get a first impression of the condition of the air conditioning. Especially during a test drive or a check at the garage, there are a number of steps you can go through yourself. They are listed below.
- Switch on the air conditioning. Listen for a clicking sound as the compressor engages. No click means the magnetic clutch may be faulty. It may also mean that no electrical voltage is reaching the compressor plug.
- Pay attention to the airflow from the vents. Does the car cool down straight away, or does the air remain lukewarm? Inconsistent cooling can indicate that the pressure in the system is not stable.
- Check via the on-board computer or dashboard whether any fault messages are active. An OBD reader is a device that reads fault codes through the diagnostic port. This tool can provide additional codes relating to the air conditioning system.
- Have a mechanic measure the electrical voltage at the compressor plug. Without the correct voltage, replacing the compressor is pointless.
- Have the system pressure measured with gauges, which are pressure metres that display the pressure in the refrigerant circuit. Too low a pressure points to a leak. Too high a pressure can indicate a blockage or an incorrect charge.
In many cases, these steps already make it clear where the problem lies. Do not skip the electrical diagnosis. Owners who did, later discovered that a faulty connection in the wiring harness was the cause, not the compressor itself.
What does air conditioning repair cost for the Peugeot 5008?
The cost of air conditioning repair depends heavily on the cause. Finding a small leak and refilling with refrigerant costs significantly less than replacing a compressor. Below is a broad overview of what you can expect.
- Refilling refrigerant and leak test: between €60 and €120
- Replacing a control valve or magnetic clutch: expect €150 to €400 including labour
- Replacing the air conditioning compressor: this soon rises to €600 to €1,200, depending on the year and version
- Replacing the condenser: on average €300 to €700
Therefore, always have a diagnosis carried out first. An electrical inspection or pressure test usually costs €50 to €100. That prevents you from replacing unnecessarily expensive parts. In many cases, the cause turns out to be cheaper to fix than you initially feared.
‘ An air conditioning system that cuts out after a few minutes or barely cools is a clear sign that it should be investigated further. ’
Always check the air conditioning during a test drive
Buying a used Peugeot 5008? Then always check the air conditioning system during the test drive. Turn the air conditioning on immediately. Then pay attention to how long it takes before the air actually turns cold. Check whether the cooling remains stable during a longer drive. An air conditioning system that cuts out after a few minutes or barely cools is a clear sign that it should be investigated further. Also ask about the service history of the system, because if the refrigerant has never been topped up or checked, that increases the risk of wear.
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Frequently asked questions
You can recognise a possibly faulty air conditioning compressor in your Peugeot 5008 if the air conditioning only blows lukewarm or inconsistently cold air and you do not hear a clear “click” or see the compressor engaging. Unusual noises under the bonnet, such as squealing, scraping or rattling when the air conditioning is switched on, are also important symptoms. In addition, the cooling may work briefly and then cut out, which can point to a problem with the compressor or the control valve. Fault codes are often also stored in the engine management system and, when read out, indicate a compressor or control problem.
The most common causes of air conditioning compressor problems in the Peugeot 5008 are electrical issues such as low voltage, poor connections or broken wires, and a faulty magnetic clutch. A compressor that has been switched off by the ECU in software is also common, for example when other engine faults are present. In addition, a faulty control valve and problems with system pressure (due to leakage, blockage or an incorrect charge) are frequently reported. Internal wear, bearing damage and corrosion of the compressor itself also regularly play a role.
Have the air conditioning system checked regularly for refrigerant level, leaks and the operation of the control valves so that the compressor does not run at the wrong pressure or with too little oil. Make sure the condenser and fan are clean and free from dirt so heat can be dissipated properly and the compressor is not overloaded. If there is a fault, always have the electrical control first checked and fault codes read out (fuses, wiring harness, magnetic clutch and earth connections) before replacing any parts. Respond immediately to unusual noises or inconsistent cooling and do not keep driving for too long with obvious symptoms, in order to prevent internal wear and consequential damage to the compressor.
The cost of a broken air conditioning compressor in a Peugeot 5008 is usually around €800 to €1,500 for replacement, including labour and recharging the system. Often, cheaper repair options are possible, such as replacing only the magnetic clutch, the control valve or rectifying an electrical fault in the wiring harness or sensors. Because the compressor in the 5008 is often only a “victim” of a voltage or pressure problem, garages usually advise a thorough diagnosis of the power supply, pressure and control valves first. Only if it turns out that the compressor is internally faulty (noise, seizure, metal particles in the system) is full replacement the recommended option.
In the Peugeot 5008, “air conditioning compressor” complaints often appear to be linked to electrical problems such as low vehicle voltage, broken wiring, poor connectors or a faulty magnetic clutch. The compressor is also regularly switched off in software by the ECU/BSI when other engine or temperature faults are present, which means it does not engage. In addition, a faulty control valve on the compressor, internal wear, bearing damage and corrosion caused by moisture recur relatively often in user experiences. In many cases, the apparent compressor problem ultimately turns out to be a combination of electrical control, pressure or refrigerant issues.
