How To Replace Honda Civic AC Compressor

How To Replace Honda Civic AC Compressor

Honda Civic: A timeless and reliable car with a stylish design known for its safety features, comfortable ride, and strong resale value However, the AC compressor problem is a common issue in our cars. If the issue is irreparable, you should know how to replace Honda Civic AC compressor.

After deep research, I was able to replace the AC compressor in my Honda Civic myself. Don’t let a scorching day ruin your drive! If your car’s AC is failing, I’ve got your back.

In this article, I will explain how I replaced my 2008 Honda Civic as a step-by-step guide. Get ready to enjoy the breeze of cool comfort once again without breaking a sweat!

AC Compressor of Honda Civic

New AC compressor in the box

The AC compressor is a crucial element in the Honda Civic‘s air conditioning system.

Here is the process for the AC compressor.

Compressing RefrigerantTakes in low-pressure, low-temperature refrigerant vapor from the evaporator coil.
Increasing Pressure and TemperatureRaises the pressure and temperature of the refrigerant. Then turns it into a high-pressure, high-temperature gas.
Heat ExchangeAllows the high-pressure refrigerant gas to release heat in the condenser coil. This process condenses the refrigerant into a high-pressure liquid.
CirculationThrough the expansion valve or orifice tube, the high-pressure liquid refrigerant transforms into a low-pressure, low-temperature combination.
Cycle ContinuationThe low-pressure, low-temperature refrigerant mixture returns to the compressor, and the cycle repeats.

What Are the Symptoms of a Bad AC Compressor?

Before replacing the alternator, you must know the symptoms of a bad AC compressor. Problems indicated by some signs are still repairable, and there is no need for replacement. If the AC compressor is bad on your Honda Civic, you can experience the following signs:

Wobbling or Rumbling Noise

You will hear a wobbling or rumbling noise when you turn on the AC. This indicates a problem with the AC compressor bearings. You can solve the problem by simply replacing the bearings.

AC Blowing Warm Air

If the magnetic coil of the AC compressor is burned, the system will blow warm air instead of cold air. The magnetic coil is replaceable.

Fried Clutch

AC compressor clutch

A bad AC compressor clutch causes excessive friction and heat. An AC compressor will not be able to work efficiently with a faulty clutch. This causes the AC compressor clutch to fry. In some AC compressors, the clutch can be replaced. However, replacing the entire AC compressor is a good idea.

System Is Not Cooling Properly

The overall symptom of a bad AC compressor is the AC system not cooling as it should, which can indicate various issues with the compressor. You have to diagnose to find the root cause of this problem if you only experience this.

Black Death

If the compressor is completely seized, we call it a black death. In this case, the AC compressor not only affects the AC system but also has a bad impact on other components like the alternator. You can fix a seized AC compressor.

How To Replace Honda Civic AC Compressor?

So, how to replace Honda Civic AC compressor? I will explain how I replace the the AC compressor of my Honda Civic in a step-by-step process.

Step 1: Prepare the Vehicle

First, I parked my Civic in the garden and engaged the parking brake. Then I lifted the hood and removed the plastic cover on the top front side of the engine. It was connected by clips.

Step 2: Disconnect the Battery

I wore gloves and safety goggles. Then I disconnected the negative battery terminal by using a 10mm wrench.

Step 3: Remove the Serpentine Belt

Next, I located the tensioner pulley which was just below the idler pulley. I inserted a 14 mm wrench into the tensioner pulley slot and loosed the nut. Then I pulled it towards my side to relieve the tension. Next, I slid the serpentine belt off the pulleys.

Step 4: Remove the Front Cover

Then I located the front cover which surrounds the radiator and the engine area. I removed the 10mm screws that secure it. I carefully removed the cover, removed the four screws securing the AC compressor, and pulled out the old AC compressor from the engine compartment.

Step 5: Drain the AC Compressor

Then I removed the top bolt of the new AC compressor and tilted it to drain any excess PAG oil. I took the draining oil to a measuring cup.

Step 6: Replace O-Rings

Next, I disconnect the AC lines from the oil compressor. They were secured by 10mm bolts. I replaced the O rings on both the high-pressure and low-pressure lines with new ones.

Note: Lubricate the new O-rings with fresh PAG oil before installing them.

Step 7: Install the New AC Compressor

Then I put the new AC compressor into place. Then I tightened the four compressor bolts to secure the AC compressor.

Step 8: Reconnect AC Lines

I reconnected the AC lines to the AC compressor.

Step 9: Reinstall the Front Cover

I placed the front cover back over the radiator and the engine area. I secured it with the mounting bolts, which I removed earlier.

Step 10: Install the Serpentine Belt

I placed the serpentine belt back on the pulleys and tightened the tensioner pulley.

Step 11: Reconnect the Battery

I reconnected the negative battery terminal and tightened it with a nut.

Step 12: Test the AC System

Finally, I started the engine and checked the AC compressor. It rotated perfectly without any noise, and the AC system blew cold air. The mission was successful!

Important: Dispose of any refrigerant in an environmentally friendly way. Wear gloves and safety glasses when working with the AC system.


What tools and equipment are required for replacing the AC compressor?

  1. 10mm Wrench
  2. 14mm Wrench
  3. Screwdriver
  4. PAG Oil Measuring Cup
  5. New O-Rings
  6. Safety Glasses and gloves

Is it safe to replace the Honda Civic AC compressor?

Yes, there are no problems with replacing the AC compressor in the Honda Civic. You can do it safely with proper guidance. However, don’t drive the car with a bad AC compressor, as it indirectly affects other components like the alternator. At least bypass the AC compressor with a serpentine belt until you replace it.

How much does it cost to replace the Honda Civic AC compressor?

The average cost of replacing a Honda Civic’s AC Compressor is approximately $966. $491 for parts and $475 for labor. This is based on typical market rates in 2023. However, there will be a slight variation in the location.

Will replacing the AC compressor improve the overall cooling performance of my Honda Civic?

Yes, for sure. It will improve the overall cooling performance of your Honda Civic.


Now you know how to replace Honda Civic AC compressor. Replacing the AC compressor of Honda Civic is an easy task you can do by yourself. Proper maintenance is essential to preventing AC compressor issues in the future.

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