HVAC Sales Master

Fault Code Lookup

HVAC Sales Master
41-13
Defrost timeout / defrost cycle did not complete properly
This code typically points to
  • Failed defrost sensor/thermistor
  • Refrigerant issue preventing proper defrost
  • Reversing valve problem
  • Outdoor fan issue during defrost
  • Low ambient conditions
Next checks to confirm
  1. Verify reversing valve operation
  2. Verify outdoor coil thermistor
  3. Check refrigerant charge
  4. Inspect outdoor fan during defrost cycle
Escalation
Persistent defrost timeouts with verified sensors indicate refrigeration or reversing-valve issue.
Reset behavior
Clears when defrost completes successfully on next attempt.
Service Soon
Schedule repair
Need deeper detail?
Retrieve the subcode for this platform:
  1. From the main screen, touch Menu
  2. Touch and hold the Service icon for at least 10 seconds until it turns green
  3. Open Service Information
  4. Use View Diagnostics for the most recent fault's top three likely root causes
  5. Use Last 10 System Events for timestamped recent events
  6. Use Run/Fault History for resettable fault counters, cycle counters, and run times
Source
Carrier 25VNA0/24VNA0 service manual event tables
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