Southbend Commercial Oven Error Code F6: Bad Temperature Controller
F6 on a Southbend convection oven is another bad temperature controller code. The manual's remedy is to replace the controller. Turn the oven off and on once, and call us if F6 comes back.
High: the controller is reported bad, and the oven cannot be relied on to regulate heat.
- Code
- F6
- Maker
- Southbend
- Equipment
- Convection ovens
- Applies to
- Gas and Electric SilverStar / Marathoner Gold convection control (programmable and rack-timer models)
What does Southbend error code F6 mean?
F6 belongs to the group of codes F1, F5, F6 and F8, all of which the manual describes as a bad temperature controller with the same repair. The manual attributes F6 to the controller itself, so an operator cannot clear it from the keypad. The manual does not say what distinguishes F6 from the others, and we avoid guessing. The practical points are what a technician checks before ordering a controller. The supply voltage, ground and connectors can cause a controller code on a good controller, and a kitchen with grease, steam and frequent cleaning is a hard environment for connectors. Once those are ruled out, the controller is replaced, as the manual directs. On a busy line, the faster the exact code and model are reported, the faster the right controller can be brought.
Affected models and control systems
Southbend Marathoner Gold and SilverStar gas convection ovens, programmable and rack-timer models (GB/15PC, SLGB/15SC), and Southbend electric convection ovens EB/10PC, programmable and rack-timer models.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- F6 appears on the control display
- The oven does not heat
- The oven shuts down after showing F6
- The display may flicker or restart
Possible causes
Likely causes — what usually sits behind error code F6 on this control. A technician confirms which one it is before any part is replaced.
- Bad temperature controller
- Water from cleaning that reached the controller connections
- A poor ground or supply connection that upsets the controller
Safe checks before calling for service
- Turn the oven off and let it rest for a minute.
- Turn it back on and see whether F6 returns.
- Keep water and spray cleaners away from the control panel.
- If it returns, note the model and the circumstances, and call us.
How a technician diagnoses error code F6
- Read the code and confirm it is F6.
- Check supply voltage and ground at the oven.
- Inspect the controller connectors for moisture or grease.
- Power cycle and observe.
- Confirm the controller part number for the model.
- Replace the temperature controller.
- The controller and its connectors are behind the panel near mains voltage.
- Moisture damage must be traced before a new controller is fitted, or the new one fails too.
- Supply and ground checks need a meter, and the readings are compared with what the oven is rated for.
How error code F6 differs from similar codes
F6 has the same cause and remedy as F1, F5 and F8.
Technical reference
- Maker documentation
- Southbend owner support
- Edition
- Part No. 1181887, Rev. 1
- Models / control
- Gas and Electric SilverStar / Marathoner Gold convection control (programmable and rack-timer models)
- Section
- Troubleshooting, Interpreting displayed error codes (manual p. 42)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Southbend convection oven error codes
Does water cause F6?
Water at the controller can cause controller codes, but the manual lists a bad controller as the cause.
Is F6 worse than F5?
The manual treats them the same.
Can I keep cooking on a second oven?
If your kitchen has one, yes, while this oven waits for service.
Need help with Southbend error code F6?
A technician confirms the cause on site and gives you the price in writing before any work starts.