why does my Honda Accord 9th Generation (2013-2017) AC only blow hot air?

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

562 words

Problem Statement

Learn how to diagnose and fix AC blowing hot air in Honda Accord 2013-2017. Step-by-step guide with diagnostic procedures 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
•Wear safety goggles and gloves when handling refrigerant

Symptoms

•AC control settings do not affect air temperature
•Unusual noises from the AC compressor
•AC compressor not engaging
•Warm air blowing from vents despite the AC being on
•Poor airflow from vents

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect the AC refrigerant level using a refrigerant gauge
3
Examine the AC compressor for signs of damage or failure
4
Check the blend door actuator by listening for movement
5
Inspect the cabin air filter for clogging
6
Evaluate electrical connections to the AC system components

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
•AC refrigerant gauge
•Multimeter
•Screwdriver set
•Trim removal tool
•Safety goggles
•Gloves

Parts Required

•AC refrigerant
•Blend door actuator (if necessary)
•AC compressor relay or fuse (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect the AC refrigerant level using a refrigerant gauge
3
Examine the AC compressor for signs of damage or failure
4
Check the blend door actuator by listening for movement
5
Inspect the cabin air filter for clogging
6
Evaluate electrical connections to the AC system components

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Recharge AC System

Tools Required: AC refrigerant gauge, refrigerant can, safety goggles, gloves.
Sub-steps:
1. Connect the refrigerant gauge to the low-pressure service port on the AC system.
2. Check the pressure; if low (below manufacturer specifications), proceed to recharge.
3. Attach the refrigerant can to the gauge and open the valve slowly while monitoring the pressure.
4. Recharge the system until it reaches the recommended pressure level.
5. Disconnect the gauge and check for leaks around the service port.

3. Inspect and Replace Blend Door Actuator (if faulty)

Tools Required: Screwdriver set, trim removal tool.
Sub-steps:
1. Remove the dashboard trim panel to access the blend door actuator.
2. Disconnect the electrical connector from the actuator.
3. Unscrew the actuator from its mounting and remove it.
4. Install the new actuator in the reverse order, ensuring proper alignment and connection.
5. Reassemble the dashboard trim panel.

4. Verify AC Compressor Operation

Tools Required: Multimeter.
Sub-steps:
1. Check the electrical connections to the AC compressor for continuity.
2. If necessary, replace the compressor relay or fuse if found faulty.
3. If the compressor is not engaging, consider replacing the compressor itself.