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Back to Trane 5TAM5D06AC41

Trane 5TAM5D06AC41 troubleshooting and error codes

Use this table to identify what the visible code may mean and what information to share when scheduling service. Keep checks simple and visible; do not open electrical, refrigerant, gas, or sealed equipment compartments.

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Error-code table

Search codes for 5TAM5D06AC41

Code Meaning System area Safe first step Action
MCB 2 Flash Active sensor communication error Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
MCB 3 Flash Active refrigerant leak or sensor-failure alarm Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
MCB 4 Flash Past refrigerant detected alarm Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
MCB 5 Flash Past sensor communication error Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
MCB 6 Flash Past sensor error Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
MCB 7 Flash Past sensor communication or sensor error Refrigerant mitigation control board Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details

Safety note

What is safe to check before service

These pages are meant to help document the issue, not replace diagnosis. GreenFlow should handle pressure-switch, electrical, refrigerant, lockout, recurring, and warranty-related conditions.

Safe visible checks

  • Thermostat display and settings
  • Filter condition and return-air path
  • Visible outdoor-unit obstruction
  • Photos of the code, unit, and nameplate

Stop and call

  • Repeated lockouts or recurring faults
  • Pressure-switch or sensor faults
  • Electrical odor, unusual noise, or ice buildup
  • Any sealed cabinet, refrigerant, gas, or warranty issue

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