HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
DEFROST
Active defrost cycle indicator shown on CDA screen
This code typically points to
    Next checks to confirm
    1. Normal state during defrost — not a fault
    Escalation
    None
    Reset behavior
    Clears when defrost completes.
    Informational
    No action needed
    Deeper detail available
    The manufacturer has pushed full per-code troubleshooting trees into the Trane Technician app. Use the app for subcode detail beyond what's shown here.
    Source
    Trane XV20i/XV18 installer/service documentation
    Look up another codeChange brand