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Carrier Mini-Split Error Codes | Service Manual Source

ModelError CodesDetails
40maqb12a36View
40maqb18a36View
40maqb24a36View
  • E2 - 40maqb12a3
  • E3 - 40maqb12a3
  • E2 - 40maqb18a3
  • E4 - 40maqb18a3
  • E2 - 40maqb24a3

When you encounter an error code on your Carrier mini-split:

  1. Note the exact error code displayed on the panel
  2. Find your model in the table above
  3. Click the error code for detailed troubleshooting steps
  4. Follow safety warnings - some repairs require professional service

Last Updated: March 2026