how to troubleshoot Honda Accord AC not blowing air through vents

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Check and Replace the Fuse

• Locate the fuse box under the dashboard or hood.
• Identify the AC fuse using the diagram on the cover.
• If blown, replace it with a new fuse of the same amperage.
• Reconnect the battery and test the AC system.

3. Inspect and Replace the Cabin Air Filter

• Access the cabin air filter compartment, typically under the dashboard.
• Remove the filter cover and take out the old cabin air filter.
• Inspect for blockages or dirt; replace with a new filter if necessary.

4. Verify and Replace the Blower Motor

• Locate the blower motor, usually found under the passenger side dashboard.
• Check for proper electrical connections and test the motor with a multimeter.
• If faulty, remove the blower motor:
  • Disconnect the electrical connector.
  • Unscrew the mounting screws and remove the motor.
  • Install the new blower motor and reconnect the wiring.

5. Inspect and Replace AC Compressor (if necessary)

• If the compressor does not engage, check the electrical connections and relay.
• If no power reaches the compressor, replace the relay or wiring.
• If the compressor is faulty, recover refrigerant, disconnect the lines, and remove it:
  • Unscrew the compressor mounting bolts.
  • Install the new compressor and reconnect lines, ensuring proper torque specifications are followed.
• Recharge the AC system with the appropriate refrigerant.