how to fix my Honda Accord 10th Generation (2018-2022) air conditioning that won’t turn on?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery's negative terminal to prevent electrical shock.

2. Check the AC Switch

• Reconnect the battery.
• Test the AC switch for proper operation using a multimeter to check continuity when pressed.
• If faulty, replace the AC switch.

3. Inspect and Replace Fuses

• Locate the fuse box (usually found under the dashboard or in the engine bay).
• Identify the AC system fuse (refer to the owner's manual for the correct fuse number).
• Remove the fuse and inspect it; replace with a new fuse of the same amperage if blown.

4. Check the Refrigerant Level

• Attach a refrigerant gauge to the low-pressure service port.
• Check the pressure readings; if low, add refrigerant according to manufacturer specifications.
• If the system is low on refrigerant, check for leaks and repair as necessary before recharging.

5. Inspect the AC Compressor

• Visually inspect the AC compressor for any signs of physical damage or leaks.
• Check the electrical connections to the compressor for corrosion or wear.
• If the compressor is malfunctioning, it may need to be replaced. Consult service manual for replacement steps.

6. Test and Replace the AC Relay

• Locate the AC relay in the fuse box.
• Swap the AC relay with a similar one from another system (e.g., horn relay) to test functionality.
• If the AC does not engage with the swapped relay, replace the faulty AC relay.