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Home/Cars/Honda/Accord/9th Generation (2013-2017)/my Honda Accord AC blows hot air what should I check

my Honda Accord AC blows hot air what should I check

Honda Accord 9th Generation (2013-2017)

Severity: mediumDifficulty: medium2-4 hours
3 min read
477 words

Problem Statement

Complete guide to fixing AC that blows hot air in Honda Accord. Includes symptoms, diagnostic steps, tools required, and repair procedures.

Component
HVAC
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Use appropriate personal protective equipment when handling refrigerants.

Symptoms

  • •Warm air coming from the vents
  • •AC compressor not engaging
  • •Unusual noises from the AC system
  • •Sweet smell from the vents (possible refrigerant leak)
  • •Increased cabin humidity
  • •AC system cycling on and off frequently

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to check for related faults.
  2. 2Inspect the AC compressor for signs of damage or wear.
  3. 3Check the refrigerant level using a manifold gauge set.
  4. 4Examine the AC fuse and relay for continuity and proper operation.
  5. 5Assess the cabin air filter for blockages.
  6. 6Inspect the AC condenser for debris or damage.

Solution

Solution

1. Preparation

  • Gather tools and parts needed for repair.
  • Disconnect the battery to ensure safety.
  • Allow the engine to cool if it has been running.

2. Check Refrigerant Levels

  • Connect a manifold gauge set to the low and high-pressure ports of the AC system.
  • Start the engine and turn on the AC to maximum.
  • Read the pressure levels; if low, proceed to recharge the system.

3. Recharge the AC System

  • Use the appropriate type of refrigerant for your Honda Accord (usually R-134a).
  • Follow manufacturer guidelines for the amount of refrigerant to add.
  • Monitor the pressure readings until they reach normal operating levels.

4. Inspect and Replace the AC Compressor

  • If the compressor is not engaging, remove the serpentine belt.
  • Disconnect electrical connections and refrigerant lines from the compressor.
  • Remove the mounting bolts and take out the compressor.
  • Install the new compressor by reversing the removal steps and properly torqueing bolts to manufacturer specifications.

5. Test the AC System

  • Reconnect the battery and start the engine.
  • Turn on the AC to check if cool air is now being produced.
  • Monitor for any unusual noises or issues during operation.

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 canister with gauge

Parts Required

  • Refrigerant (R-134a)
  • AC compressor (if needed)
  • Cabin air filter (if needed)

Additional Information

Component

HVAC

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

3 items

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