Honda Accord 9th Generation (2013-2017) AC compressor won't turn on, what to check

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

489 words

Problem Statement

Learn how to diagnose and fix AC compressor issues in Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and solutions.

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 before opening any components to avoid burns

Symptoms

•AC compressor does not engage when the AC is turned on
•Warm air is blowing from the vents
•AC light on the dashboard may be illuminated or flashing
•Increased engine RPM when AC is activated
•Possible unusual noises from the engine bay when AC is engaged

Diagnostic Steps

1
Check the AC system for refrigerant levels using a gauge
2
Inspect the AC compressor clutch for any visible damage or disconnections
3
Verify the operation of the AC switch and relay
4
Scan the vehicle’s onboard computer for any diagnostic trouble codes (DTCs) related to the AC system
5
Check the electrical connections and fuses associated with the AC system

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

•Manifold gauge set
•Multimeter
•Socket set
•Screwdrivers
•Torque wrench

Parts Required

•AC compressor (if defective)
•AC clutch assembly (if defective)
•AC relay (if defective)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Check the AC system for refrigerant levels using a gauge
2
Inspect the AC compressor clutch for any visible damage or disconnections
3
Verify the operation of the AC switch and relay
4
Scan the vehicle’s onboard computer for any diagnostic trouble codes (DTCs) related to the AC system
5
Check the electrical connections and fuses associated with the AC system

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a flat surface and the engine is turned off.
Disconnect the battery to avoid electrical hazards.

2. Check Refrigerant Levels

Connect a manifold gauge set to the AC service ports (high and low side).
Read the pressures; ensure they are within the manufacturer's specified range.
- If low, proceed to recharge the system; if normal, go to the next step.

3. Inspect the AC Compressor Clutch

Locate the AC compressor in the engine bay.
Check the clutch for signs of wear, damage, or lack of engagement.
If faulty, replace the compressor or the clutch assembly as necessary.

4. Test AC Switch and Relay

Locate the AC relay in the fuse box.
Use a multimeter to check for continuity when the AC switch is activated.
If the relay is defective, replace it.

5. Electrical Connections and Fuses

Inspect all wiring harnesses connected to the AC compressor for damage or corrosion.
Check the fuses related to the AC system and replace any blown fuses.