how to fix Honda CR-V Fifth Generation (2017-2022) AC that blows warm air

Honda CR-V Fifth Generation (2017-2022)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

525 words

Problem Statement

Learn how to diagnose and fix the AC blowing warm air issue in Honda CR-V Fifth Generation (2017-2022). Step-by-step guide with tools and procedures.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Handle refrigerants with care and ensure they are evacuated by a licensed technician if needed.

Symptoms

•AC system blowing warm air
•Unusual noises from the AC compressor
•AC compressor not engaging
•Foul odor from the AC vents
•Decreased airflow from the vents
•Refrigerant leak visible under the vehicle

Diagnostic Steps

1
Check the vehicle's refrigerant levels using a pressure gauge.
2
Inspect the AC compressor for signs of damage or wear.
3
Test the AC compressor clutch to ensure it engages when the AC is turned on.
4
Examine the AC fuse and relay for continuity.
5
Look for any visible refrigerant leaks around hoses and connections.
6
Inspect the cabin air filter for clogs or dirt that could restrict airflow.

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
•Basic hand tools
•Torque wrench

Parts Required

•Refrigerant (R-1234yf)
•AC compressor (if necessary)
•Cabin air filter (if clogged)

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Diagnostic Steps

1
Check the vehicle's refrigerant levels using a pressure gauge.
2
Inspect the AC compressor for signs of damage or wear.
3
Test the AC compressor clutch to ensure it engages when the AC is turned on.
4
Examine the AC fuse and relay for continuity.
5
Look for any visible refrigerant leaks around hoses and connections.
6
Inspect the cabin air filter for clogs or dirt that could restrict airflow.

Solution

1. Preparation

Gather tools and materials.
Disconnect the vehicle's battery to ensure safety during repairs.
Tools required: OBD-II scanner, refrigerant gauge set, basic hand tools, torque wrench.

2. Check and Replenish Refrigerant

Sub-steps:
1. Connect the refrigerant gauge to the high and low-pressure service ports.
2. Read the pressure levels; if low, proceed to recharge.
3. Add the appropriate refrigerant type (R-1234yf for this model) until the correct pressure is achieved.
4. Disconnect the gauge set carefully.

3. Inspect and Replace AC Compressor

Sub-steps:
1. Locate the AC compressor and check for visible damage.
2. If damaged, remove the serpentine belt by loosening the tensioner pulley.
3. Disconnect electrical connectors and refrigerant lines from the compressor (ensure refrigerant is evacuated by a professional).
4. Remove the compressor mounting bolts and take out the old compressor.
5. Install the new compressor, ensuring it is properly aligned.
6. Reconnect refrigerant lines and electrical connectors securely.
7. Reinstall the serpentine belt and tension it properly.

4. Test AC System Functionality

Sub-steps:
1. Reconnect the vehicle's battery.
2. Start the engine and turn on the AC to the maximum setting.
3. Monitor the AC compressor for engagement and check for cold air.
4. Inspect for any refrigerant leaks after the system is recharged.