Fault Code Lookup

HVAC Sales Master
b4
Motor trips
This code typically points to
  • Accessible public snippet confirms the code and failure state, but the full cause list is not fully exposed in the accessible snippet

Next checks to confirm
  1. Turn power off prior to repair
  2. Use full troubleshooting chart in the public service manual for the unit-specific cause tree

Escalation
Furnace fails to operate
Reset behavior
Not explicitly detailed in accessible public snippet.
Urgent
Fix now
Source
DM80VC/DC80VC installation manual troubleshooting chart snippet and DC96VC-family troubleshooting section confirm b4 'motor trips', but the complete row was not fully exposed in the accessible snippet