Rational combi oven descaler tablets
Use for scale-related steam generator faults before replacing hardware.
$25-$80
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Commercial Combi Oven Error Codes — What They Mean
Commercial combi ovens from Rational (SelfCookingCenter, iCombi) and Alto-Shaam (Vector, Combitherm) are standard equipment in high-volume commercial kitchens. They display diagnostic codes or error messages when faults are detected.
Rational SelfCookingCenter / iCombi Error Codes
| Code | Meaning |
|---|---|
| E01 | Temperature sensor fault |
| E02 | Humidity sensor fault |
| E03 | Core temperature probe fault |
| E10 | Steam generator fault |
| E20 | Fan motor fault |
| E30 | Drain blocked |
| E40 | Water supply fault |
Most Common Rational Fixes
E10 — Steam Generator: The steam generator has a scale buildup problem or heating element failure. Run a descaling cycle with Rational descaler. If E10 persists, the heating element may have failed.
E20 — Fan Motor: Fan motor overload or failure. Check for foreign objects in the oven chamber blocking the fan, or bearing failure on the motor.
E30 — Drain Blocked: The oven drain is blocked with food debris or scale. Clean the drain filter and flush the drain path with hot water.
E40 — Water Supply: Check water supply pressure (40–80 PSI required), inlet valve, and water filter saturation.
Alto-Shaam Combi Error Codes
| Code | Meaning |
|---|---|
| E-01 | Cabinet temperature sensor fault |
| E-02 | Steam temperature sensor fault |
| E-10 | Heating element fault |
| E-20 | Fan fault |
| E-30 | Water supply fault |
Most Common Alto-Shaam Fixes
E-10 — Heating Element: Check element continuity (should read 10–50Ω depending on wattage). Open circuit = replace. Verify contactor operation.
E-20 — Fan Fault: Inspect fan for obstruction. Check motor continuity and capacitor.
E-30 — Water Supply: Verify supply pressure and inlet valve operation.
Parts Often Needed
| Part | Notes |
|---|---|
| Descaling solution (Rational) | Run monthly in hard water areas |
| Steam generator heating element | Most common E10 fix on Rational |
| Fan motor | For E20 on both brands |
| Water inlet valve | For E40/E-30 |
Related Resources
- Browse all commercial refrigeration error codes — True, Hoshizaki, Manitowoc, and more
- Alto-Shaam Commercial Oven Error Codes — Guide
- Beverage-Air Refrigerator Error Code E1 — Causes & Fix
- Beverage-Air Refrigerator Error Code E2 — Evaporator Sensor …
Need Replacement Parts?
Before ordering, match the refrigeration part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
When to Call a Pro
Combi oven electrical repairs involve high-voltage heating elements and control boards. Rational and Alto-Shaam authorized service should handle component-level repairs.