Stoelting F431 (IntelliTec control)
Twin-barrel floor soft-serve machine. After fixing the cause, switch that side’s Freezing Cylinder Off-On switch off and back on to clear the code.
What it is: Soft-serve machine
Stoelting F431 (IntelliTec control) error codes
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E1 | Program board | Control board microprocessor | Switch off and on; replace the board if it stays. |
| E2 | High torque | Drive motor over 125% of the cut-out amps for 10 s, often from low or unsteady supply voltage | Check supply voltage, motor and start parts. |
| E3 | Low torque | Compressor ran 20 min without reaching consistency: low mix, broken-down mix, blocked inlet, ice crystals, poor airflow or a stuck solenoid | Check mix level and quality, airflow and the solenoid valve. |
| E4 | Clean | Left in clean mode over 20 minutes | Not a fault. Switch the side off and on. |
| E5 | Freezing cylinder sensor | Sensor failed or reading outside about -37 to 37 °C | Machine keeps serving on timers. Check the sensor against the 10 kΩ chart (±400 Ω). |
| E6 | Hopper sensor (single-hopper machines) | Sensor failed or out of range | Check the sensor. |
| E7 | Drive motor | No motor current seen | Check wiring at the control and motor, and the motor contactor. |
| E8 | Cabinet sensor | Sensor failed or out of range | Check the sensor. |
| E9 | High pressure cut-out | Dirty condenser, blocked filter, fan or poor water flow | Switch off, press the high-pressure reset, clean, then switch back on. |
| E10 | Auxiliary (board) sensor | Sensor on the control board | Board may be faulty. |
| E11 | Low temperature | Refrigerant at the barrel sensor too cold, usually low or no mix | Add mix. The freeze cycle ends early. |
| E12 / E13 | Left / right hopper sensor | Sensor failed or out of range | Check the sensor. |
| COMMO TIMEOUT | Display lost the control board | Loose or faulty phone-style cable | Reseat the cable at both ends; replace cable or display. |
Notes
- Hard errors (2, 3, 4, 7, 9) trigger an automatic restart after 5 minutes on version 3.5 and later; the display shows Restart. After the third failed restart for high torque, run time or drive motor errors, the machine goes to Sleep 3 (barrel kept cold, no stirring).
- Green and amber lights flashing in turn means a side is switched off while the cabinet is still cooling, or an error is active.
For licensed technicians only. This equipment can involve mains voltage, high-voltage microwave circuits, gas and refrigerant. Isolate power (and gas) before opening panels, follow the manufacturer's manual and your local licensing rules (for example ARC refrigerant handling and electrical or gas licences). Wrong settings can spoil food or damage equipment. Check every value on the unit in front of you before changing it.
Based on: Stoelting F431 operator manual 513605, sections 1 and 7. Always check the manual for your exact model and software version.
ServiceModes is not affiliated with Stoelting or any other manufacturer. Written in our own words from the manufacturer's documentation.