Car AC Compressor Not Working But Fan is Running [Fixed]

Is your car AC compressor not working but fan is running? What could be going wrong? This article will explore the causes of this problem and how to solve it.

Car AC Compressor Not Working But Fan is Running
Image by Felix Wong

If you’re not feeling that blast of cold air, it’s time to figure out why.

Insufficient Refrigerant

If your AC compressor is running on low refrigerant, it’s like trying to run a marathon without any water. It won’t work! The fan, however, doesn’t need the refrigerant to run, so it keeps on spinning.

Electrical Issues

Like any good mystery, sometimes the problem lies beneath the surface. Electrical problems could stop your compressor from doing its job, while the fan continues to run unaffected. Think of it like a blackout, but only affecting one part of your house!

Worn Out Compressor

A worn-out compressor can stop your car’s AC from working too. It’s like a tired old workhorse, no longer able to do the job it once did. Meanwhile, the fan, untouched by age and wear, keeps on running.

Diagnosing Car AC Compressor Not Working But Fan is Running

If your compressor’s not working, it’s time to play detective. Let’s see what we can find out!

Visual Inspection

Look for signs of wear and tear, or any obvious damage to the compressor. Is it worn out, like an old shoe? Meanwhile, if your fan’s still spinning, it’s saying, “I’m ready to work!”

Pressure Test

A pressure test, in this context, is akin to a health check-up for your car’s AC system. You see, every AC system operates within a certain pressure range, and this is especially critical for the compressor.

To conduct this test, you’ll need a set of AC gauges that you’ll attach to the high and low service ports on your car’s AC system. You then compare the readings to the ideal pressure for your specific car make and model.

This test will tell you if your compressor is running on low refrigerant, which would be like asking an athlete to run a marathon without any water – it’s bound to go south. If the pressure is too low, it could indicate a refrigerant leak or a problem with the compressor itself.

Electrical Tests

Electrical tests are like detective work in a mystery novel. They allow you to open up the book and dive deep into the plot. Your AC compressor relies heavily on electrical connections to function, and any issues here could stop it in its tracks.

With the help of a multimeter, you can test the electrical connections to the compressor to make sure they’re functioning as they should. If you find the voltage is too low or non-existent, it could point toward faulty wiring, a blown fuse, or an issue with the AC relay.

Meanwhile, if the fan continues to run as normal, it’s like a character in our book who remains unaffected by the plot twist, waiting for its partner to join back in the action.

Check out these other related articles…

AC Compressor Amperage: Ultimate Guide to AC Performance

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AC Compressor Diagnosis: Ultimate Guide to AC Car Repair

Bad AC Compressor Symptoms Noise: Fixes & Prevention

How to Check AC Compressor with Multimeter: Your Easy Guide

How to Fix AC Compressor on Car: A Comprehensive Guide

Car AC Compressor Failure Symptoms: Detection & Solution

How to Fix a Non-Working Car AC Compressor

So you’ve found the problem? Awesome! Now, how do you fix it?

Recharging Refrigerant

Think about your AC system like a runner preparing for a race. Before the starting shot, the runner needs to hydrate and prepare. Similarly, recharging the refrigerant in your AC system might be all it needs to get back on track. Refrigerant is the lifeblood of the AC system, and if levels are low, it can’t effectively cool the air.

Recharging involves adding more refrigerant to the system, and while this might sound like a quick fix, it’s best to let a professional handle it to prevent any overcharging or accidental release of refrigerant into the atmosphere.

Replacing Electrical Components

Sometimes, the solution to your compressor woes lies in replacing faulty electrical components. It’s like having a bad fuse in your house – once you replace it, everything is back to normal.

Depending on the results of your electrical tests, you might need to replace the wiring, a fuse, or the AC relay. These components are integral to providing power to your compressor, and without them, the compressor can’t do its job. But don’t worry, your fan will keep doing its job, patiently waiting for the compressor to come back online.

Replacing the Compressor

When all else fails, it might be time to replace the entire compressor. Think of it as a heart transplant for your AC system. The compressor is the heart of the system, and if it’s no longer functioning correctly, it could be time for a new one.

Replacing the compressor is a pretty significant job and should definitely be left to the professionals. Once the new compressor is installed, it’s like giving your AC system a new lease on life, and your fan will certainly appreciate its new partner!

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