Error Code 11
Info

Carrier 58MVC Error Code 11: No Previous Code

TL;DR
Your Carrier 58MVC has no stored error codes. No faults have occurred in the past 72 hours and the furnace is operating normally.
Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

What Does Code 11 Mean?

Status code 11 on the Carrier 58MVC means the control board's diagnostic memory is empty — no previous fault codes have been recorded. Stored codes are automatically erased after 72 hours, so code 11 indicates either no faults have occurred at all or any previous faults have been cleared by the automatic timer.

The Carrier 58MVC stores fault codes in memory so that HVAC technicians can review the furnace's recent history. This is useful for diagnosing intermittent problems that may not be actively occurring when the technician arrives. To access stored codes, the R thermostat lead is disconnected, power is reset, and setup switch SW1-1 is placed in the ON position.

Seeing code 11 is a good sign — it means the furnace has been running without issues. If you are experiencing a problem with the furnace right now despite code 11 showing clean history, the current issue may be too new to have been stored, or it may be intermittent. A technician can observe the system in real-time during a heating cycle to catch any active faults.

Common Causes

Cause Likelihood DIY?
No faults have occurred in the last 72 hours Most common —
Contact a licensed HVAC technician if any of these apply:

Sources

  1. 58MVC Series 100 Troubleshooting Guide — Variable Speed, Step-Modulating Electronic Condensing Four-Way Multipoise Gas Furnace

✓ Verified against manufacturer service manual — March 2026