how to fix the AC compressor not engaging in my Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to ensure safety.

2. Check and Recharge Refrigerant

• Tools Required: Refrigerant gauge set, refrigerant canister.
• Sub-steps:
  1. Connect the refrigerant gauge set to the low-pressure service port.
  2. Check the low-pressure reading. If it’s below the recommended level, proceed to recharge.
  3. Attach the refrigerant canister to the gauge set and open the valve slowly.
  4. Monitor the pressure gauge and stop adding refrigerant once the appropriate level is reached.
  5. Disconnect the gauge set and reconnect the service port cap.

3. Replace AC Fuse and Relay

• Tools Required: Multimeter, replacement fuses/relay.
• Sub-steps:
  1. Locate the fuse box (usually under the dashboard or in the engine compartment).
  2. Use a multimeter to test the AC fuse for continuity.
  3. If the fuse is blown, replace it with a new one of the same amperage.
  4. Locate the AC relay and test for proper operation; replace if faulty.

4. Inspect and Replace AC Pressure Switch

• Tools Required: Socket set, replacement pressure switch.
• Sub-steps:
  1. Locate the AC pressure switch on the AC line.
  2. Disconnect the electrical connector from the switch.
  3. Remove the switch using a socket set.
  4. Install the new pressure switch and reconnect the electrical connector.

5. Check AC Compressor Clutch

• Tools Required: Torque wrench, replacement compressor (if needed).
• Sub-steps:
  1. Inspect the AC compressor clutch for physical damage.
  2. If the clutch is damaged, remove the compressor by disconnecting the AC lines and mounting bolts.
  3. Install the new compressor, ensuring to torque the bolts to manufacturer specifications.
  4. Reconnect the AC lines and vacuum the system before recharging.