Fault Code Lookup

HVAC Sales Master
8
Weak Flame
This code typically points to
  • Weak flame-sense signal

Next checks to confirm
  1. Clean flame sensor
  2. Measure flame current

Escalation
Can produce recycles/lockout
Reset behavior
Clears when flame-sense issue corrected.
Urgent
Fix now
Source
Trane 18-CD26D1-13 Installer's Guide, p.43