To make the subject of “Air Conditioning Compressors” more intelligible and to simplify the processes of inspecting and replacing them in the everyday work of an automotive garage, we show you here the construction and function of an air conditioning compressor, explain how to repair and replace it and supply hints for troubleshooting noise problems and performing the replacement. This technical video gives you practical information and demonstrates how to professionally exchange or replace the air conditioning compressor. The following technical information and practical tips were created by HELLA to support professional automotive garages in their daily work. The information presented here on this website should only be used by trained automotive technicians taking the respective safety regulations and country-specific legislation and practice into account. Car air conditioning compressor: Overview and important instructions Car air conditioning compressor repair Car air conditioning compressor replacement: Video

Car air conditioning compressor damage Car air conditioning compressor noise: Troubleshooting information in the case of noise A damaged or failed compressor can manifest itself as follows: Insufficient or no cooling performance Error code in the air-conditioning control unit or engine / central control unit There are a number of possible causes of failure: Bearing damage caused by a defective tensioner or by wear Leaks in the compressor shaft or the housing Mechanical damage to the compressor housing Lack of refrigerant oil Defective tensioning elements and ancillary units Function test and pressure measurement of the system: Does the compressor switch on, is the connector plug securely in place, is power applied? Check the electrical control valve and/or the activation circuit. Check that the drive belt is positioned correctly, undamaged, and that there is power. Check visually for loss of sealing. Check that refrigerant hoses are securely in place.

Compare the pressures on the high and low-pressure sides. Read out the event memory in newer systems. Experience the air conditioning compressor now! Seeing means understanding - Discover the vast possibilities of our unique Know How Tool. Practical and in detail, we show you:can you recharge rv ac unit actively helping you identify the fault cause andac window unit alternatives assisting in the repair process by providing you with technical background knowledge.fan motor for an ac unit Take advantage of our Know How Tool and discover the unique experience of practicality made simple. Start the Know How Tool now > Note: Password protected area - Login needed! The source of this content is the Online Portal for automotive garages HELLA TECH WORLD.

To see the information login is required. The registration for the HELLA workshop portal is absolutely free of charge. Click here and register now for free > Workflow for error analysis and replacement What is the customer complaining about? What does the garage do? What needs to be done? Is the customer sufficiently informed? What is the cause for the compressor failure? Information for garages and parties accepting repairs Air conditioning compressor noise: Troubleshooting information in the case of noise Check all retaining clamps and attachment points for breakage or cracks and possibly missing bolts or nuts. Check tubes and pipes to determine, whether vibrations from the engine or pulsing refrigerant enter into the vehicle interio Check V-belts, tensioners, tension pulleys, freewheel clutch (alternator) and belt pulleys for smooth running, play and alignment. Excessive high pressure (figure 8) can cause abnormal compressor noise.

Excess or contaminated refrigerant causes excessive high pressure, which may cause compressor noise. The condenser can also be considered as cause of unusual noise. Often noise can be caused by contaminated expansion valves (figure 10) or orifice tubes.How do you repair your car's air conditioning system? To repair your car's air conditioning system, check for any leaks in the unit's coils, and fix them using a leak sealer; refill the refrigerant if its pressure and level are less than optimum; and clean the unit's condenser. In addition, check for any damaged wires, blown fuses, dysfunctional switches or a broken fan belt, and replace them as needed. How do you fix your car's air conditioning? What are some common AC problems? To check for any leaks in the car air conditioner's coils, introduce a fluorescent dye into the unit via the low pressure recharge port present on the canister, and switch the unit on. Use an ultraviolet light source to detect any leaks.

Purchase a refill kit, and use the leak sealer that comes with it to fix the leak. To check the refrigerant's pressure and level, connect a pressure gauge to the hose of the air conditioner's compressor, and switch the unit on. If the reading obtained on the gauge is less than normal, have the refrigerant refilled by a technician. If the auto air conditioner's cooling fan does not work, it indicates a clogged condenser. To fix this issue, clean the component using a duster. Lack of a humming sound when the unit is switched on indicates a dysfunctional compressor, which could occur because of damaged wires, switch or fuse. Check each of these separately, and replace the damaged parts. In addition, disconnect the compressor wire that runs to the car's electric clutch, and connect it to the car battery's positive terminal. If a "cluck" sound is not produced, it indicates that the clutch is dysfunctional and needs replacement. Test the air conditioner after every repair made.

If these do not work, get the unit repaired by a professional. What are the main parts of an auto air conditioning system? The main parts of an automotive air conditioning system consist of a compressor, evaporator, condenser, thermal expansion valve, sensors and refrigeration ... How do you recharge a vehicle's air conditioning? To recharge a vehicle's air conditioning system, connect the hoses of a gauge set to the unit's low and high side lines, switch on the system, and note the... What are some common issues with car air conditioning systems? Bacteria build-up, a low refrigerant level, refrigerant leaks and clogged air intakes are some common issues associated with car air-conditioning systems. Those planning to fix their car's air conditioning system should become more familiar with the individual parts of the system itself. These include the con... How can you purchase a supercharger for your truck? How do you find out what is wrong with your vehicle and the cost to repair it?