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

558 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold air 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 systems.
•Use appropriate safety gear when handling refrigerants.

Symptoms

•AC compressor not engaging
•Warm air blowing from the vents
•Unusual noises from the AC unit
•Foggy windows due to humidity inside the vehicle
•AC system cycles frequently without cooling

Diagnostic Steps

1
Check the AC system for any visible leaks or damages.
2
Scan for error codes using an OBD-II scanner to identify any HVAC-related issues.
3
Verify the refrigerant level using a manifold gauge set.
4
Inspect the AC compressor for signs of wear or failure.
5
Test the AC relay and fuses for continuity and proper operation.
6
Check 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
•Manifold gauge set
•Socket set
•Torque wrench
•Refrigerant recovery machine

Parts Required

•Refrigerant (as per vehicle specifications)
•AC compressor (if needed)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system for any visible leaks or damages.
2
Scan for error codes using an OBD-II scanner to identify any HVAC-related issues.
3
Verify the refrigerant level using a manifold gauge set.
4
Inspect the AC compressor for signs of wear or failure.
5
Test the AC relay and fuses for continuity and proper operation.
6
Check the cabin air filter for blockages or excessive dirt.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and ensure the engine is off.
Disconnect the battery to ensure safety while working on electrical components.

2. Recharge the Refrigerant

Tools Required: Manifold gauge set, refrigerant canister
Attach the manifold gauges to the low and high-pressure ports of the AC system.
Start the engine and turn the AC to the maximum setting.
Check the pressure readings; if low, proceed to recharge the refrigerant.
Connect the refrigerant canister to the low-pressure port and open the valve.
Monitor the pressure and fill until it reaches the manufacturer's specifications.

3. Replace AC Compressor (if necessary)

Tools Required: Socket set, torque wrench, refrigerant recovery machine, AC compressor
Disconnect the battery again for safety.
Remove any components obstructing access to the AC compressor.
Use the socket set to remove the bolts securing the compressor.
Disconnect the electrical connector and the refrigerant lines from the compressor.
Install the new compressor, ensuring it is correctly aligned.
Torque the bolts to the manufacturer specifications.
Reconnect the refrigerant lines and the electrical connector.

4. Replace Cabin Air Filter (if blocked)

Tools Required: None (may require hand tools for certain models)
Locate the cabin air filter housing, usually behind the glove compartment.
Remove the glove compartment to access the filter.
Slide out the old filter and replace it with a new one, ensuring the airflow direction matches the markings.
Reassemble the glove compartment.