VW Beetle AC Compressor Clutch Won’t Engage? (Best solution)

Diagnose and fix VW Beetle AC Compressor Clutch Won’t Engage Shops are finding the root problem for a VW Beetle compressor clutch won’t engage may be caused by a fuse box corrosion issue, not a bad compressor clutch or low refrigerant issues as most people suspect (VW calls this a fuse bracket).

What would cause an AC clutch to not engage?

One of the reasons why compressors do not engage is because of a low pressure lockout, a poor ground, a bad clutch coil, an opening in the wire to the clutch coil, or simply a blown fuse. There are several ways A/C compressor clutches receive power.

Can you manually engage AC compressor clutch?

Unplug the single wire connector on the front side of the compressor. Take the fused jumper wire and connect its one end to that side of the wire connector that was connected to the compressor. It will supply the battery voltage to the compressor clutch, allowing it to engage manually.

How do I manually jump my AC compressor clutch?

At the compressor’s front side, unplug the single wire connector, take a jumper wire and attach it to the wire that you just disconnected from the compressor. Connect the other end of the jumper’s wire to the positive terminal of the car battery. This will enable the compressor to start manually.

How do I know if my compressor clutch is bad?

Bad AC Compressor Clutch Symptoms

  1. Higher Cabin Temperatures. The most common sign of all bad ac compressor clutch symptoms is a higher cabin temperature than usually during hot days when you need the A/C.
  2. Loud Noises.
  3. Clutch Stopped Moving.
  4. Inability to Turn Air On or Off.
  5. Leaking Refrigerant.

How do I know if my AC clutch relay is bad?

One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all. In most cases, when the AC is turned on you will be able to hear the compressor switch on. It will usually produce a familiar clicking noise from the clutch being activated.

What causes low pressure lockout?

When a unit cycles or locks out on the low pressure switch, what should you look for? the most common cause is low air flowacross the evaporator. look for dirty filters, dirty evaporator coil, dirty blower wheel.

Why does my car AC compressor not work?

If the AC compressor doesn’t turn on, the most common culprit by far is low AC refrigerant. Poor grounding, frayed wiring, bad clutch coil, and defective AC pressure sensor switch can also be an issue although less common.

Can you replace AC clutch without removing compressor?

Yes you can just replace the clutch pulley on the a/c compressor. The issue that you may have is the pulley bearing seized up and may have spun on the front of the compressor nose cone and will damage it. You may need to replace compressor.

What Should I Do If AC Compressor Clutch Is Not Engaging

In case you notice that the air conditioning (AC) compressor clutch in your automobile is not engaging, you may need to get assistance from a professional. You will discover what you can do in such a case by reading this post. It is possible that the compressor clutch is not engaging for a variety of reasons. However, you will be unable to utilize your air conditioning system during this time. The compressor clutch is a critical component of your vehicle’s air conditioning system. As a result, it is a significant annoyance for the passengers when it is rendered useless.

In some cases, even if you use synthetic oil or coolant in your car, the compressor clutch might be destroyed as a result of electrical issues.

The majority of automobiles today employ an electromagnetic air conditioning clutch system to automate the operation of engaging and disengaging the air conditioning compressor.

Because you rely on your air conditioning system to perform flawlessly, we’ll walk you through the procedures you should take in such a case.

What is an AC Compressor Clutch?

It is the flywheel of your car’s engine that provides the power for an air conditioning compressor clutch to operate. Using an electromagnetic switch, it is controlled by a clutch system in which the shaft of the flywheel is engaged and disengaged from a spinning shaft of the clutch system. Your car’s air conditioning system is comprised of several critical components, two of which are the compressor and clutch. These parts, as well as other automotive components, should be regularly maintained in order to guarantee that they are always in proper working order at all times.

How Does an AC Compressor Clutch Work?

The clutch compressor is triggered in order for you to be able to utilize the air conditioning in your automobile anytime you wish. The clutch compressor is powered by an engine that is directly linked to the pump rotor of the compressor by means of a belt drive. The majority of automobile air conditioning systems make use of an electromagnetic clutch element that engages the compressor in order to spin the air conditioning unit. The compressor clutch is made out of a friction plate that is placed next to an electromagnetic coil to provide friction.

This generates a powerful electromagnetic force that pulls the coil in the direction of the friction plate and contacts the pump rotor, which in turn drives the compressor to operate.

How to Determine Whether the Compressor Clutch Is Working

The pump will not operate if the clutch does not engage with the compressor.

There will be no coolant or refrigerant to circulate through the air conditioning system in order to cool your vehicle if this occurs. To determine whether or not the clutch is functioning properly, use the following methods:

  • Set the air conditioning controls to the highest possible setting. Start the vehicle’s engine. Take a closer look at the front of your clutch purse. When you reach this point, the clutch and pulley should both be rotating. It is not possible for the clutch to operate when the pulley is the only spinning component.

Important pointers to remember if you are not an expert in automobile maintenance. According to Smart motorist, I recommend that you collaborate with a Car Diagnostic Tool. Most scan tools can be plugged straight into your dashboard and can even give you notifications when there is a problem with your vehicle’s electrical system. This is not only for problems with the air conditioning compressor, but for nearly all problems with the engine as a whole.

What Can Make The Clutch Not To Engage?

Some of the probable reasons why the clutch does not engage with the compressor are listed below.

  • An insufficient amount of lubricant in the compressor
  • Too much refrigerant
  • Not enough refrigerant Using the clutch sensor’s lockout as a default setting: Most current automobiles are equipped with air conditioning compressor clutches, which are controlled by the high- and low-pressure switches, as well as the amount of compressor oil, which is controlled by the fuse. This combination of three factors can prevent the clutch from engaging if the sensor detects that the compressor has inadequate oil, has too much refrigerant, or has too little refrigerant. Fuse that has been blown: To determine whether or not the fuse has been damaged, turn off the car’s engine and remove the fuse from the system. Check the fuse with a multimeter or any other instrument that can determine the fuse’s state of readiness. If the fuse has not been damaged, it should be returned to its original position.
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What Should I Do If AC Compressor Clutch Is Not Engaging?

The following are some of the various methods that you might take to resolve the situation. The level of compressor oil may be easily determined by looking through the display glass. A red line in the display glass indicates that there is sufficient oil. If the level falls much below the red line, you will need to add more oil. It is essential that you choose an oil type that is appropriate with your specific compressor model. Make use of compressor oils that have been certified by the manufacturer of your air conditioning system.

  1. A high pressure reading on the system indicates that the compressor has been overloaded with a refrigerant, which is not usual.
  2. You should drain the refrigerant from the compressor if you are convinced that it has been overcharged.
  3. Continue to bleed until you reach the desired degree of pressure.
  4. If the pressure gauge records a lower pressure than required, the compressor is too low.
  5. Recharging your refrigerant is possible with the use of repair kits, which come with detailed instructions on how to recharge the coolant.


It is not difficult to determine whether or not your air conditioner’s compressor clutch is faulty. If you notice that anything is not operating properly with the air conditioning system, you can assess if there is a problem with it. If the DIY suggestions don’t provide the desired results, you may take the car to your technician and have him do a thorough inspection of the air conditioning system. When there is a problem with the system, the clutch on the AC compressor is not supposed to engage.

As a result, the next time the clutch fails to engage, be sure to check these components on a regular basis to avoid problems: We hope you found the information in this post useful!

How To Manually Engage AC Compressor Clutch: The Easiest Methods

Tsukasa Azuma is the author of this piece. Comments received since the last update on December 24, 20200 Many major problems can arise in a car, and one of these is a malfunctioning air conditioning compressor clutch. When this component is not functioning properly, the engine does not receive sufficient cold air flow, which might result in some serious issues.

Knowing how to manually engage the AC compressor clutchcan save you money by avoiding a trip to the mechanic’s shop. In addition, you should be familiar with how to inspect the clutch to determine if it is malfunctioning or not.

How To Examine The AC Compressor Clutch?

Failure of an air conditioning compressor clutch may result from the use of low-quality oil, but it may also occur even if you use synthetic oil and high-quality coolant. It has been reported that the clutch does not engage in a few instances owing to a blocked refrigerant circuit. If you wish to check for problems with an air conditioning compressor clutch, use the following techniques:

Working Method 1

Before starting the engine, make sure all of the air conditioning settings are set to the maximum setting. Examine the condition of the clutch’s front side to determine its age. Additionally, check to see whether the clutch and pulley are rotating. It is likely that the compressor clutch is malfunctioning, which might be caused by various factors, including a blown fuse, poor clutch oil, low-pressure lockout, or an open wire in the oil. Before testing the compressor, turn the air conditioner up to its maximum setting (maximum setting).

Working Method 2

In some automobile models, a low-pressure switch might cause difficulties with the compressor clutch’s relay, which you should be aware of before moving on to the next phase of the diagnostic process. The relay is grounded by the system’s computer, but it is susceptible to being turned on and off by a faulty switch. An in-depth examination of the system and its components can assist you in identifying the root of the malfunction. It is necessary to disconnect the connection cable from the clutch oil at this phase.

Make use of a digital voltmeter to check the ground and battery voltage at the end of the disconnected connection cable.

If the fuse is found to be in working order, proceed to the clutch relay.

Working Method 3

When the air conditioning system is turned on, electrical power travels from the AC switch to a fuse before being passed to the clutch oil through a temperature differential between the low-pressure evaporator and the clutch oil. This means you must make certain that the compressor has sufficient oil to perform correctly. The next step is to engage the clutch after you have determined that there is an issue with it. The next section explains how to manually activate the AC compressor clutch at your house.

  • The Simplest Method for Using a Recharge Kit for Your Car’s Air Conditioning
  • Do you want to recharge your car’s air conditioning system at home? Take a look at this

How To Manually Engage AC Compressor Clutch

It’s not difficult to engage the AC compressor clutch at home; it’s not rocket science. There are a handful of ways you may resolve the issue in order to restore proper operation to the air conditioning system.

Method 1: Add More Coolant

In what situation does an air conditioning compressor fail to activate the most frequently seen reason? There is a low level of refrigerant. When the amount of coolant in the system drops below a certain point, the low-pressure switch prevents the compressor from rotating. When the system’s antifreeze level is low, how do you manually activate the AC compressor clutch? Easy. Simply increasing the amount of refrigerant will solve the problem. It is possible to restore the normal working of the compressor clutch by adding a can of R134a refrigerant to your car’s system if it is compatible with this type of refrigerant and the low-pressure switch has been disabled.

Tips– To avoid having to manually activate the compressor, make sure that the system has enough oil before starting it. Inadequate lubrication has the potential to cause harm to the compressor. Adding a can of coolant is the quickest and most straightforward option. Source:

Method 2: Jump-start The Clutch

For older vehicles that are not compatible with the R134a type, the procedure is a little more complicated. Only a few minutes are required to get things going, and the procedure will not last longer than that: Check the oil level in the compressor to make sure it is enough. If the level is below the typical point, more oil should be added. Check the owner’s handbook to ensure that you are following the recommended procedures for monitoring the compressor oil level and refilling the compressor.

Take the fused jumper wire and attach one end of it to the side of the wire connector that was connected to the compressor, and the other end to the other side of the wire connection that was not connected to the compressor.

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Remove the jumper wire from the battery.

It is not necessary to turn on the air conditioning system in order for this approach to function.

Method 3: Replacing The Clutch

When the clutch engages but the compressor does not spin, it is a warning indication that something is wrong. In this situation, it is possible that changing the compressor clutch is the only option. A faulty AC compressor clutch must be repaired as soon as possible. In the event of a delay, substantial damage to the air conditioning system and engine may result.

Air Conditioner Not Working: It Never Stops but Just Blows Air. I .

Alternatively, if the compressor has failed inside, it may be asking for air conditioning and engaging the clutch, but the compressor is not actually operating. The problem is that if there is an internal issue, you will almost certainly have to replace more than just the compressor. In the event of a failure, they are known to spew forth shards that travel through the lines to the condenser and cause clogs. The standard procedure is to first determine the cause of the compressor failure, then remove the components and flush the system before replacing the compressor, condenser, drier, expansion valve, as well as the seals and oil.

The instructions that come with a new compressor are shown in the photo attached.

I would say that you can do the most of the work yourself, but the front condenser isn’t that much fun because VW made replacing it tough without the proper equipment.

The fenders and bumper come off in a single piece, after which you remove the radiator support, drain the cooling system, disconnect the radiator, and tip the lock carrier out of the vehicle.

An alternative approach, if the compressor is faulty, would be to purchase a used one, remove any lines that can be reached, flush the system several times in both directions, add half a charge of oil to the compressor, turn it over a few times to ensure it is operational, and then reinstall the compressor as before.

Although it is not the most ideal method, I have seen it work.

The system will then be recharged based on its weight. Image (Click on the image to see it larger.) On Thursday, July 11th, 2019 at 2:32 PM, a sponsored link will be posted.

Tech Tip: Volkswagen Has No Power to the A/C Compressor Clutch

More information is available by clicking here. Vehicle Year of Production:2000 Beetle 2.0 was released in 2002. Beetle 1.9 was released in 2002. Golf 1.8 (from 1999 to 2003) Golf 2.0, from 2000 to 2005 1999-2005: Jetta 1.8 and 1.0 (1.8L and 1.0L). Jetta 2.0 and Jetta 2.8 (model years 2000-2002) Customer Complaints: The A/C is not functioning properly. When there is no power going to the A/C compressor clutch, the clutch does not engage and the compressor does not run. (There is a manual temperature control.) Possible causes include: Air Conditioning Compressor, A/C Pressure Sensor F129, A/C Switch, Ambient Temperature Switch F38, Battery Auxiliary Fuse Box, Fan Control Module J293 (and wiring), Fuse or a broken throttle cable Basic Preferences Tests/Procedures: Examine the Fan Control(FCM) module’s inputs in the following ways: To ensure that all tests are successful, the ignition key and A/C are turned on, and the connections to the fan module are plugged into the fan module.

  1. The fan control module is positioned beneath the radiator and is equipped with two connectors: a 14-pin (T14) and a 4-pin connector (T4).
  2. At all times, ensure that 12 volts are applied to pins T4a/1 (red/black) and T4a/3 (red) through fuses S164 and S180, which are located in the fuse box on top of the battery.
  3. Corrosion and burn marks on the three push-in type fuses should be visually inspected for.
  4. Even if the compressor is not working and the refrigerant levels are within normal ranges, a duty cycle of more than 80 percent or less than ten percent will tell the compressor to shut down, indicating a defective pressure sensor.
  5. Ensure that pin T14/4 (red/gray) is receiving 12 volts at all times by using fuse 16.
  6. Check for a proper ground connection to pin T14/6 (brown/black).
  7. When the A/C is turned on and the blower motor is working at any speed, check to see that 12 volts are available at pin T14/8 (blue/red) from the A/C switch in the instrument panel.



An overheat condition will cause the instrument cluster to ground this reference, which will cause a compressor shutdown to be requested.


Connect pin T14/10 (green/black) to the power supply with a fused 12-volt jumper.

If the compressor does not engage, look for a short circuit or a loss of ground at the compressor’s wire harness.




It is possible that the engine control module (ECM) will ground this reference to request a compressor shutdown when the engine is operating at wide open throttle (WOT) or when the throttle basic setting is missing.


Tech Suggestions: Note: If the ECM detects that the throttle fundamental settings have been lost, it will ground pin T14/3.

If there is a ground condition on pin 3, execute a throttle basic setting operation and test the voltage to ensure that it is right.

If necessary, a repair kit for replacing the 14-pin fan control module connection is available from Volkswagen under the part number 6X09737717 KIT. The image is courtesy of Identifix.

Car air conditioner compressor clutch not engaging

Using the troubleshooting steps given here, you may determine if your car’s air conditioner compressor clutch is not engaging properly. The air conditioning compressor is engaged and disengaged by use of an electro-magnetic clutch, which is used by automobile manufacturers. The three components of the air conditioning compressor clutch in an automobile are as follows: When power is applied to the clutch coil, the magnetic field created by the current draws the clutch in and engages the compressor shaft.

  • As a result, you should begin by evaluating whether or not the compressor clutch is operational.
  • Then have a look at the compressor clutch from the front.
  • If the only thing that is rotating is the pulley, there is an issue elsewhere in the system.
  • In certain cars, the low pressure switch and the evaporator temperature sensor are used to control the compressor clutch relay, which is switched on and off.
  • Remove the electrical connector from the clutch coil and set it aside.
  • Use a digital voltmeter to check for battery voltage and good ground at the connector when the engine is running and the AC is set to the maximum setting.
  • If the fuse is good, replace the compressor clutch relay.

Some automobile manufacturers use the PCM or ECM to trigger the relay control coil ground, while others do not.

When electricity is applied to other cars, it passes via the air conditioning switch and into the fuse, and then passes through the fuse, past the low pressure and evaporator temperature sensors, and into the clutch coil.

See also:  Abnormal AC pressure gauge readings? (Suits you)

As a result, automakers include a low pressure switch in their vehicles, which prevents the compressor from functioning when the system is short on refrigerant.

However, if the system’s refrigerant level is too low, the clutch will not engage.


Even if you are successful in getting it to accept a charge, it is possible that you have already destroyed the compressor.

This will force the compressor to operate with insufficient oil, which may result in the compressor being destroyed.

Due to the fact that there is likely air and moisture in the system, the leak is significant and should be addressed.

After that, the system should be completely evacuated to ensure that all air has been removed before it can be recharged.

Adding extra refrigerant is possible without having to hot wire the low pressure switch and operate the compressor at full capacity.

In order to recharge the battery, connect it to the low pressure (suction) connector.

In addition, the DIY kit fitting will only attach to the low pressure port, not the high pressure.

To activate the radiator fans, turn the air conditioner up to its maximum setting.

Depending on whether your car is equipped with an orifice tube system, the refrigerant gas will pass through one of the open compressor reed valves before entering the condenser coil.

Because the compressor will not be functioning, there will be no pressure in the system.

Whenever a liquid enters the evaporator, it will boil and change back into a gas as long as the blower fan is operating.

Try starting the engine and inspecting the compressor to see what happens.

If this procedure does not work, you should take it to a professional.

Compressor and clutch assembly for air conditioning systems Sachin Naireautorepair.net was founded in 2015.

Technical service bulletins, code definitions and step-by-step testing, as well as easy-to-understand wiring diagrams, are all included, as is an explanation of how the systems are designed to function.

Take a look at these!

Furthermore, you must access to the most recent technical service bulletins so that you do not spend time and money repairing parts that may misbehave as a result of a software bug on the part of the manufacturer.

They will only serve to mislead you.

Get a 1-Month (31 Days) subscription for $16.99, a 1-Year (Best Value!) subscription for $25.99, or a 4-Year (Best Value!) subscription for $39.99. I like the wiring diagrams on Eautorepair.net to the difficult-to-read factory schematics on Alldatadiy because they are more user-friendly.

What to Do If an A/C Compressor Clutch Does Not Disengage

Images courtesy of Jupiterimages/Photos.com/Getty Images Because of the refrigerant that is kept within, air conditioning compressors are tough to deal with. When a compressor clutch fails to disengage, the refrigerant will build up and freeze the line, resulting in a frozen compressor. It is necessary to change a switch in order to release the clutch.

The Low-Pressure Switch

The low-pressure switch informs the vehicle that the clutch must be engaged and disengaged, and it will also turn off the air conditioning compressor. It will no longer be able to gauge pressure when the switch fails, resulting in the clutch being held in place during the whole process. This switch is positioned on the metal canister adjacent to the compressor, on the left side of the canister. A screwdriver is used to secure it to the refrigerant canister, and two wires are attached to it and run to the electrical harness.


The A/C Compressor Clutch is of the kind and condition “new.” Arctic Air is the brand name, and the manufacturer’s part number is CL167646. Various other part numbers: CO 4573JC, 5512327, 6512327, PXE16, CO 4573JC, 5512327, 6512327 976569, 976600, 976630, 2008675, 2008675M, 2021760, 2022130, 2022696, 2022696AM, 14SD675, 14SD8675C, 1K0820803F, CO2088C, C1982R, C2374R, C2375, C2703, C2703R, Z0018376, TEM255350, TEM275530, TEM275855, TEM255350, TEM275 OEM1: 1K0820803G, 1K0820803Q, 1K0820803S, 1K0820808BOEM2: 1K0820808BX, 1K0820808D, 1K0820808F, 1K0820859F OEM3: 1K0820803G, 1K0820803Q, 1K0820803S, 1K0820808BO There are four seasons: 167646, 168646, 168746, and 168946.

The following numbers are assigned to Sanden1: 1601, 1615-1620, 4569, 4571, 4573, 7571.

This part is compatible with

2010-2011 Audi A3 2.0L Turbocharged Audi A3 2.0L Diesel, model years 2010-2011 2010 Audi A3 Quattro 2.0L Turbocharged Audi TT 2.0L 2008 Audi TT Quattro 3.2L 2008 Audi TT 2.0L 2013-2015 Volkswagen Beetle with a 2.0-liter engine 2013-2015 Volkswagen Beetle with a 2.0L diesel engine 2010-2015 Volkswagen CC 3.6L (Compact Car) 2010-2011 Volkswagen CC 2.0L (2.0 liters) Volkswagen Eos 2.0L (2010 model year) 2013 Volkswagen Golf 1.4L (four-cylinder) 2012-2013 Volkswagen Golf 2.0L (2.0 liters) 2010-2011, 2013, and 2014 Volkswagen Golf 2.0L Diesel (VW Golf 2.0L Diesel) 2010-2011 Volkswagen GTI 2.0L (two-liter turbocharged) 2010-2015 Volkswagen Jetta 2.0L with a manual transmission 2010-2015 Jetta 2.0L Diesel Engine, Volkswagen 2010 Volkswagen Jetta 1.8L 2010, 2012, and 2015 model years Volkswagen Passat 3.6L (VW Passat) Volkswagen Passat 2.0L Diesel2010, 2012, and 2015 Volkswagen Passat 2.0L Diesel Volkswagen Passat 2.0L 2010 Volkswagen Passat CC 2.0L 3.6L Volkswagen Passat CC 2.0L 3.6L 2013-2014 Volkswagen Tiguan 1.4L Turbocharged 2011-2014 Volkswagen Tiguan 1.4L Turbocharged

About the product

Transmission clutches for air conditioner compressors are responsible for controlling the flow of power from the engine to the vehicle’s air conditioner. When an automobile is started, the drive belt rotates the clutch body around a pulley, which causes the clutch to engage. As soon as the air conditioner is turned on, the system supplies electricity to the clutch coil, causing the clutch to link with the air conditioner compressor. If the clutch in your vehicle won’t engage, if it screeches, or if the air conditioning system in your vehicle is spewing heated air, it may be time to repair the clutch.

It is necessary to replace the compressor, condenser, and drier if there is a burning smell or the clutch no longer rotates.

Maintain the safety of your system with an Arctic Air AC Compressor Clutch replacement!

We manufacture only the highest-quality goods that meet or exceed OEM requirements. To take advantage of free delivery inside the Continental United States, order now! Is this product not what you’re searching for? Please let us know. Take a look at our other Clutches here!

AC clutch engages but still no cold air

If we’ve ruled out the potential of a leak in the system and you’re still not getting cold air, the problem is most likely due to regular wear and tear. A sealed system for the refrigerant is meant to exist, however this is rarely the case. If your air conditioning system has never been maintained, or if it has been several years (6+) since it has been serviced, you may be suffering typical leakage as a result of this. Vehicles are subjected to traffic vibrations, temperature fluctuations, and simply the passage of time.

The refrigerant will leak away very slowly, and air will be injected into the system at a very slow rate.

Rebuilding the system should restore it to like-new condition and provide you with a good 10 – 15 years of service life.

If my recollection serves me properly, 1994 would have been within the timeframe of when automobiles began to transition from r12 to r134a fuel.

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