Fault Code Lookup

HVAC Sales Master
Flashing Slow
Normal operation, no call for heat
This code typically points to

    Next checks to confirm
    1. Normal state — verify call-for-heat scenario if complaint is no heat

    Escalation
    None
    Reset behavior
    Normal powered state.
    Informational
    No action needed
    Source
    Trane 18-CD19D2-18 Installer's Guide, p.23 code table