how to fix Honda CR-V Fifth Generation (2017-2022) AC not blowing cold air

Honda CR-V Fifth Generation (2017-2022)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

600 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold air in Honda CR-V (2017-2022). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

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 vehicle to cool down before working on the AC system to avoid burns.

Symptoms

•AC system not cooling air
•Warm air blowing from vents
•AC compressor not engaging
•Unusual noises from the AC unit (e.g., clicking or grinding)
•Smell of refrigerant or musty odors from vents

Diagnostic Steps

1
Check the refrigerant level using a pressure gauge.
2
Inspect the AC compressor visually for signs of damage or leaks.
3
Test the AC system with an OBD-II scanner for any related error codes.
4
Verify that the AC clutch is engaging when the system is activated.
5
Check the condition of the cabin air filter for blockages.
6
Inspect the AC relay and fuses for continuity.

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
•Manifold gauge set
•Refrigerant can
•Socket set
•Torque wrench
•Screwdriver
•Multimeter

Parts Required

•Refrigerant (R-134a or as specified)
•Cabin air filter
•AC compressor (if needed)
•AC relay and fuses (if needed)

Related Faults

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Diagnostic Steps

1
Check the refrigerant level using a pressure gauge.
2
Inspect the AC compressor visually for signs of damage or leaks.
3
Test the AC system with an OBD-II scanner for any related error codes.
4
Verify that the AC clutch is engaging when the system is activated.
5
Check the condition of the cabin air filter for blockages.
6
Inspect the AC relay and fuses for continuity.

Solution

1. Preparation

Gather tools and parts required for the repair.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the battery to ensure safety while working on electrical components.

2. Recharge Refrigerant

Tools Required: Refrigerant can, manifold gauge set
Connect the manifold gauges to the low and high-pressure ports of the AC system.
If the refrigerant level is low, attach the refrigerant can to the low-pressure port and follow the manufacturer's instructions to recharge the system.
Monitor the pressure readings and ensure they are within the specified range (typically around 30-40 PSI for low side and 200-250 PSI for high side).

3. Replace Cabin Air Filter

Tools Required: Screwdriver (if applicable)
Locate the cabin air filter compartment, usually behind the glove box.
Remove the glove box to access the filter.
Take out the old cabin air filter and replace it with a new one, ensuring proper airflow direction (indicated on the filter).
Reassemble the glove box.

4. Inspect and Replace AC Compressor

Tools Required: Socket set, torque wrench
If the compressor is not engaging or shows signs of failure, remove the serpentine belt by loosening the tensioner pulley.
Disconnect the electrical connector and refrigerant lines from the compressor.
Remove the mounting bolts and take out the old compressor.
Install the new compressor and torque the bolts to the manufacturer's specifications.
Reconnect the refrigerant lines and electrical connector.

5. Replace AC Relay and Fuses

Tools Required: Multimeter
Locate the fuse box and refer to the owner's manual for the location of the AC relay and fuses.
Use a multimeter to check for continuity in the relay and fuses.
Replace any faulty components with new ones.