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Trane error code 166

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Trane error code 166

If you’re seeing error code 166 on your Trane HVAC system, it’s indicating a problem with the outdoor unit’s communication board. This error code can be caused by various issues, including a faulty communication board or wiring issues.
 
To troubleshoot this error code, check the wiring connections between the indoor and outdoor units. Make sure all connections are secure and free of damage. If the wiring is intact, you may need to replace the communication board.
 
It’s important to note that attempting to repair or replace components of your HVAC system can be dangerous and should only be performed by a licensed professional. If you’re uncomfortable troubleshooting the issue, contact a qualified HVAC technician to diagnose and repair the problem.
 
Ignoring error code 166 can lead to further damage to your HVAC system and potentially more expensive repairs. If you’re experiencing this error code, it’s best to address it immediately.