Fault Code Lookup

HVAC Sales Master
12
Ignition-related lockout / retry condition on this generation
This code typically points to
  • Public accessible snippet does not expose the per-code meaning text separately
  • Treated as part of ignition/lockout family in this generation

Next checks to confirm
  1. Use underlying ignition diagnostics
  2. Confirm whether manual revision for exact furnace exposes 12 as retry/lockout state before publishing to production tool as customer-facing text

Escalation
One-hour soft-lockout family
Reset behavior
Soft-lockout reset behavior per control.
Urgent
Fix now
Source
Rheem Select / W801T Installation Instructions. User-requested code list aligns with this public control generation, but exact per-code text was not exposed in the accessible snippet; lockout family and reset rules are public.