Fault Code Lookup

HVAC Sales Master
A113_F
One-hour lockout: ignition failure
This code typically points to
  • Four ignition trials without flame

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

Escalation
One-hour soft lockout after four ignition trials without flame; if heat call remains after one hour, sequence restarts; repeats until successful ignition, power interruption, or heat call removal
Reset behavior
Auto-clear after one hour OR interrupt electrical power for at least 5 seconds OR remove heat call.
Urgent
Fix now
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