What to do if your a / C clutch is not working?

When the A/C system does not blow cold air the first thing that you show check is if the compressor engages. If it doesn’t do not assume that the A/C compressor itself is the problem. Remember that the A/C clutch is controlled by the A/C Control Unit. If that unit detects an error it will not engage the A/C compressor to avoid it getting damaged.

What does the a / C clutch coil test do?

An A/C clutch coil is an electromagnetic device used to pull the clutch hub that’s splined to the compressor shaft into firm contact with a belt driven pulley. This action engages the compressor. Take great care when running these tests, because the coil and harness plug are very small and may be difficult to work with.

How to tell if your a / C compressor clutch is working / engaging?

If there are error codes on the A/C Control Unit the compressor will not engage and you will need to reset the fault codes using a diagnostic scanner such as the Launch Creader or iCarsoft MB II. How to tell if your air conditioner AC compressor clutch is working / engaging?

What is the purpose of the a / C clutch on a Mercedes?

Purpose of the A/C Compressor Clutch While the A/C compressor on your Mercedes-Benz is an important part of the system, the A/C compressor clutch is even more important. Every time you want cold air to blow on your Mercedes-Benz cabin you turn on the climate control and set your desired temperature.

What do you need to know about clutch sensors?

Clutch sensors are simple mechanical switches, typically held in place by two screws and attached to only two wires. Consult your workshop manual to learn the location of the switch. Test by bridging the contacts with a multimeter. Clutch sensors seldom have serviceable parts; a failed unit must be replaced.

How does a / C compressor clutch coil test work?

A/C Compressor Clutch Coil Test An A/C compressor clutch coil is a simple device made of fine windings of wire wrapped into a coil. When current is passed through the coil, it creates a strong magnetic field that pulls a splined hub into contact with the spinning pulley. This action engages the compressor.

Why does my car clutch not engage when low on refrigerant?

That’s why car makers install a low pressure switch–to prevent the compressor from running if the system is low on refrigerant. DIY recharging kits tell you to recharge through the low pressure port while the compressor is engaged. But if the system is low on refrigerant, the clutch will never engage.

How does the clutch work on an air conditioner?

Otherwise the A/C compressor engages and starts to compresses the refrigerant. By compressing the refrigerant we add pressure to the system. The A/C compressor clutch engages to create the high pressure in the refrigerant and it’s state is controlled by the Air Conditioner Control Unit.

How to troubleshoot a / C compressor clutch problems on your Mercedes?

This video is helpful if you are trying to troubleshoot air conditioner problems, the A/C compressor clutch in particular. This opens in a new window. Start by turning the engine on. Set the AC to maximum cold setting. Open the hood and look at the serpentine belt to locate the AC compressor.

Why is my air conditioner clutch not working?

If your Air Conditioning compressor isn’t working (the clutch won’t engage) then watch this video. The A/C switch on the dash switches the compressor on, with one exception. If the PCM (powertrain control module) senses low pressure in the low pressure fluid line, it will stop the compressor clutch from engaging to prevent any damage.

Why is there no activation of a / C CLUTCH?

There was no activation of a/c clutch. Chevy Mechanic: Dan, ASE Certified Technician replied 10 years ago Remove the relay for the AC. There should be two power terminals, and one terminal going to the compressor and the other one going to pin 1 of that clear connector on that circuit.

What should I do if my GMC AC clutch does not engage?

Disconnect the clear connector from the Vehicle Control Module (VCM). Connect a fused jumper wire between cavity 1(dark green wire with a white stripe) of VCM clear connector and ground. Turn the Ignition Switch to the Run position. Listen for an audible click from the A/C Compressor Clutch. Does the clutch click? If so:

What to do when your air conditioner won’t take Freon?

If the compressor clutch shoe is not rotating, but the pulley is, then you can unplug the electrical connection on the low pressure switch and put a jump wire into the harness jumping the connection on both terminals. This should engage the compressor clutch.

Why is the clutch not engaged on my Mercedes?

Remember that the A/C clutch is controlled by the A/C Control Unit. If that unit detects an error it will not engage the A/C compressor to avoid it getting damaged. One other reason why the A/C compressor does not engage is the fact that the system may be low on R134 refrigerant.

How is the clutch connected to the AC unit?

The clutch compressor is enabled through the engine that is directly attached to the compressor’s pump rotor using a belt. However, most car AC systems now use an electromagnetic clutch piece that engages the compressor to spin the air conditioning unit.

Why is the fan clutch on my Dodge 3500 not working?

I have a 07 3500 5.9 lit. with A/C Problems. It damagged the compressor. The Fan don’t turn when the AC is on. (Only with Temperature). The Compressor failed again. The mechanic said that if the fan clutch is going bad it causes the high pressure to build up which is bad for the compressor.

When to replace a GM A / C compressor clutch?

I was told to make the air gap between the clutch and the pulley assembly between 20-30 thousands. A big note, when you get the clutch off put the tool back on and try and move the shaft up and down and sideways. If it moves around the bearings and seal are probably bad and no need to just replace the clutch.

Where is the a / C clutch on a Cummins diesel?

The A/C clutch field coil to the front of the compressor using a snap ring (5). pressed onto the front of the compressor. engine accessory drive belt.

Which is the AC clutch on a Dodge?

Dodge is showing part 5003 681AA as the AC clutch. It is a whole lot cheaper to change out just the clutch as you could probably do it with the compressor still hooked up and full of freon so you would not have to get a new drier and refill the system. Not sure.

What’s the difference between the old and new clutch?

Now that the new clutch is in. The trucks driveability has completely changed for the better. The truck was more sluggish before the new clutch, but now it seems to have less drivetrain resistance that it did before and the performance has improved substantially.

Can a dual disk clutch cause a slip?

No slipping at all when installing a dual disk clutch set up but beware that the pedal pressure will go way up and so will the noise level from the Aluminum G56 rattling. I’m a somewhat mad at myself for not picking up one with an Automatic instead.

What does it mean when your AC compressor does not turn?

Suppose the compressor clutch is not engaging; this is how to check the AC compressor clutch. If the pump is not working, the compressor will not turn. When this happens, it means that there is no refrigerant circulating inside the whole system, and the AC system will not work properly.

How do you replace an AC compressor clutch?

How to replace an AC Compressor Clutch. To remove the clutch, screw in the removal tool and hold the clutch disc with the holding tool. Use this tool to hold the AC clutch disc while you remove the pulley. Remove retaining nut on the compressor shaft while holding the clutch disc with the holding tool. Then install the clutch disc puller.

How do you know if your AC clutch is bad?

Listen for any internal buzzing or clicking from the clutch. If the clutch fails to engage and spin, but you hear electrical buzzing or clicks inside, it indicates an internal clutch short. Listen for excessive bearing noise coming from the clutch or compressor.

Why does my AC clutch not engage?

Why AC clutch won’t engage. If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. AC compressor clutches receive power in a number of ways.

Why is my AC compressor not spinning?

If the compressor is working, but the fan won’t turn, then the problem is most likely with the motor and/or capacitor. If you don’t hear any sounds to indicate that the compressor is working, and the fan isn’t spinning, the most common causes are a lack of power or a faulty compressor contactor.

What does it mean when your a / C clutch does not engage?

If the Compressor doesnt engage with direct power from the battery then the Compressor is shot. Sorry also jump the high pressure switch.. IF the still doesnt engage it then you need to run power directly to the AC compressor and see if the compressor engages then.

Why is the pulley not engaging the clutch?

Turn the air conditioning controls to MAX AC and start the engine. Then look at the front of the compressor clutch. Both the pulley and the clutch should be spinning. That means the clutch has properly engaged with the pulley. If only the pulley is turning, but the clutch disc isn’t, there’s a problem somewhere in the system.

How to diagnose an air conditioner clutch problem?

1 Start by turning the engine on. Set the AC to maximum cold setting. 2 Open the hood and look at the serpentine belt to locate the AC compressor. 3 Now look at the pulley of the air conditioner compressor. The center part (the clutch) should be engaged and should be spining along with the pulley.

What to do if your a / C clutch is not working?