why does my Honda Civic smell musty inside when the AC is running

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the battery to avoid any electrical issues.

2. Replace Cabin Air Filter

• Sub-steps:
  1. Locate the cabin air filter access panel, typically behind the glove compartment.
  2. Remove the glove compartment by detaching the clips or screws.
  3. Take out the old cabin air filter and inspect for dirt and moisture.
  4. Install a new cabin air filter, ensuring it is properly oriented.
• Tools Required: Screwdriver
• Safety Warnings: Always ensure the engine is off and the battery is disconnected before working on electrical components.

3. Clear AC Drain Line

• Sub-steps:
  1. Locate the AC drain line, usually found on the passenger side beneath the vehicle.
  2. Use compressed air or a flexible wire to clear any blockages in the drain line.
  3. Check for any moisture draining from the line after clearing it.
• Tools Required: Compressed air source or flexible wire
• Safety Warnings: Be cautious of hot engine components if performing this step soon after driving.

4. Clean Evaporator Core

• Sub-steps:
  1. Gain access to the evaporator core by removing the dashboard or AC housing as needed.
  2. Use an evaporator cleaner spray to treat the core, following the product instructions.
  3. Allow it to dry completely before reassembling.
• Tools Required: Evaporator cleaner spray, screwdriver set
• Safety Warnings: Use gloves and goggles to protect skin and eyes from chemicals.