Fault Code Lookup

HVAC Sales Master
A055_F
Inducer high-pressure switch won't open (latched alarm, two-stage variants)
This code typically points to
  • High-pressure proving circuit latched to alarm state

Next checks to confirm
  1. Inspect inducer high-pressure proving devices and associated tubing/wiring

Escalation
Latched state
Reset behavior
Clears after fault correction; may require power cycle.
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 fault table