Fault Code Lookup

HVAC Sales Master
8 flashes
Weak flame
This code typically points to
  • Dirty flame rod
  • Poor burner carryover
  • Grounding issue
  • Flame sensor wiring fault

Next checks to confirm
  1. Clean flame rod and measure flame current
  2. Verify burner carryover and flame pattern
  3. Verify grounding

Escalation
Repeated weak flame after cleaning and grounding checks points to combustion quality or sensor sensitivity.
Reset behavior
Stored in memory; auto-erased after 14 days.
Service Soon
Schedule repair
Source
Emerson 50V64-743 diagnostic features