how to fix Honda Civic 9th Generation (2012-2015) when the AC is not blowing cold

Honda Civic 9th Generation (2012-2015)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

608 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold in Honda Civic 9th Generation (2012-2015). Step-by-step guide with tools and parts required.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool down before opening the hood or working on the AC components.

Symptoms

•AC compressor not engaging
•Warm air blowing from vents
•Unusual noises from the AC system
•AC compressor clutch not spinning
•Foul odors coming from AC vents
•Decreased fuel efficiency

Diagnostic Steps

1
Inspect AC system for visible leaks or damage.
2
Check refrigerant levels using a pressure gauge.
3
Scan the vehicle's computer for any AC-related error codes.
4
Verify that the AC compressor is receiving power with a multimeter.
5
Inspect the AC relay and fuse for continuity.
6
Test the cabin air filter for blockages or excessive dirt.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Refrigerant gauge set
•Multimeter
•Socket set
•Screwdriver set

Parts Required

•Refrigerant (R-134a)
•AC compressor (if needed)
•AC relay (if needed)
•Cabin air filter

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Diagnostic Steps

1
Inspect AC system for visible leaks or damage.
2
Check refrigerant levels using a pressure gauge.
3
Scan the vehicle's computer for any AC-related error codes.
4
Verify that the AC compressor is receiving power with a multimeter.
5
Inspect the AC relay and fuse for continuity.
6
Test the cabin air filter for blockages or excessive dirt.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface with the engine off and cooled down.
Disconnect the battery to prevent electrical shorts.

2. Check and Recharge Refrigerant

Connect the refrigerant gauge set to the low and high-pressure service ports.
Check the refrigerant pressure against manufacturer specifications.
If low, add the appropriate refrigerant (R-134a) and monitor pressures to ensure they reach the recommended levels.
Disconnect the gauge set and securely replace the service port caps.

3. Inspect and Replace AC Compressor

Remove the drive belt from the AC compressor using a socket set.
Disconnect the electrical connector from the AC compressor.
Remove the mounting bolts securing the compressor to the engine and carefully take it out.
Install the new compressor by reversing the removal steps, ensuring all bolts are torqued to specification.
Reconnect the electrical connector and reattach the drive belt.

4. Check and Replace AC Relay and Fuses

Locate the fuse box under the dashboard or in the engine bay.
Remove the AC relay and test it with a multimeter for continuity.
If defective, replace the relay with a new one.
Inspect and replace any blown fuses related to the AC system.

5. Replace Cabin Air Filter

Locate the cabin air filter housing, typically behind the glove compartment.
Remove any screws or clips securing the glove compartment and gently lower it.
Take out the old cabin air filter and clean the housing area.
Install the new cabin air filter in the correct orientation.