Fault Code Lookup

HVAC Sales Master
A115_F
One-hour lockout: gas valve stuck closed
This code typically points to
  • Gas valve circuit / valve stuck closed condition

Next checks to confirm
  1. Find and correct underlying valve issue
  2. Contractor app holds detailed tree

Escalation
One-hour soft lockout
Reset behavior
Auto-clear after one hour OR power interrupt ≥5 seconds OR remove heat call.
Safety Critical
Immediate concern
Deeper detail available
The manufacturer has pushed full per-code troubleshooting trees into the Rheem Contractor App (QR code on equipment). Use the app for subcode detail beyond what's shown here.
Source
Rheem RDFXYC Installation Instructions one-hour soft-lockout section