Field Modification September 27, 2023 18:24 Updated Resolution: Field Modification Request Parts Requests - Submit the request to your Local Trane Parts. Articles in this section Trane Commercial Help Center Registration - Installing and Servicing Contractors Trane Commercial Customer Help Center Overview - Self-Service & Live Factory Support Field Modification Trane CHVAC (+ Independent CSO) Registration and Sign-In Required for Support and Content Related articles Trane Commercial Customer Help Center Overview - Self-Service & Live Factory Support UC400 to CSTI conversion/ field modification Wiring UC400 to CSTI board Trane Commercial Help Center Registration - Installing and Servicing Contractors Symbio™ 700 - Compressor Proving Circuit(s) Troubleshooting for Precedent and Odyssey