Fault Code Lookup

HVAC Sales Master
45.1
Control failure
This code typically points to
  • Internal control-board fault
  • Sometimes surfaced after repeated false lockouts

Next checks to confirm
  1. Verify line and low-voltage supply
  2. Verify no induced miswire/backfeed
  3. Replace control if fault persists

Escalation
Board-level escalation.
Reset behavior
Not documented in public snippets as a timed auto-reset; treat as persistent until corrected/reset.
Urgent
Fix now
Source
Public 58SC0B manual snippets