Fault Code Lookup

HVAC Sales Master
7 red flashes
No ignition after three trials
This code typically points to
  • Gas off or low gas pressure
  • Faulty gas valve
  • Dirty flame sensor
  • Faulty igniter
  • Burner problem

Next checks to confirm
  1. Verify gas valve switch and gas supply
  2. Verify igniter and flame prove
  3. Inspect burner carryover

Escalation
Repeated trials exhausted; retry after lockout.
Reset behavior
1-hour lockout then retry.
Urgent
Fix now
Source
TG9S/TM8Y install manuals