Fault Code Lookup

HVAC Sales Master
ERR.068.01
Defrost Fault B and/or C
This code typically points to
  • Very high delta T
  • Defrost terminated at least 10 times in a row on maximum defrost time

Next checks to confirm
  1. Investigate max-time defrost terminations pattern
  2. Check refrigerant charge and coil condition
  3. Check outdoor fan operation during defrost

Escalation
Not explicitly exposed in the accessible public snippet
Reset behavior
Not explicitly exposed in public snippet.
Service Soon
Schedule repair
Deeper detail available
The manufacturer has pushed full per-code troubleshooting trees into the Trane Technician app. Use the app for subcode detail beyond what's shown here.
Source
Trane System Alert Guide public distributor-posted PDF, 068.xx family (page 18 for related snippet)