Rational Error Code Reference — All 5 Codes
Complete Rational error code cheat sheet. All 5 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Rational combi oven, warewasher, or other commercial kitchen equipment shows a service or error code mid-shift. Start with the exact code, then open the fix guide for probe faults, water and drain problems, heating failures, and control board issues.
Tip: search the exact brand, model, and code together, for example "Rational E13" or "Rational not draining".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Commercial Combi Oven Error Codes | Rational & Alto-Shaam Guide | — | Fix → |
| Rational iCombi Classic & Pro Error Codes: E01, Service 20.x, 21, 26 Fixes | Every Rational iCombi Classic and iCombi Pro error code explained. E01 board fault, Service 20.x sensor codes, Service 21, Service 26, and legacy SCC WE codes. Step-by-step diagnosis with OEM part numbers for commercial kitchen technicians. | — | Fix → |
| Rational SelfCookingCenter Service Codes: SCC WE, Legacy SCC and iCombi Reference (Service 10-121, Sub-Codes, Gas Lockout) | Rational combi service codes taken from the four OEM service references: legacy SCC 2004-2011, SCC whitefficiency, iCombi Pro and iCombi Classic. Service 10-14 water faults, the Service 20.x thermocouple sub-codes, CleanJet Service 25, the Service 28/29 temperature limits most lists get wrong, and the gas Service 140 lockout. | — | Fix → |
| Rational Service 140.4 and 140.8: The Gas Lockout Codes That Block Your Combi Oven From Cooking (SCC, iCombi Pro, iCombi Classic) | Service 140.4 warns of repeated gas combustion faults on Rational combi ovens; a third trigger within 72 hours produces Service 140.8 and blocks cooking. The official trigger criteria from TI_2220, the critical gas errors behind it (17/18/22/37/38/42), and the per-series service-menu reset paths. | — | Fix → |
| Rational Service 25 Error: CleanJet Water Circulation Fault on SCC and iCombi (Causes and Step-by-Step Fix) | Service 25 on a Rational combi means the CleanJet water circulation check failed: the oven saw no water flow, or the jet never loaded the fan wheel. The OEM check list is water supply, pressure, rack position, hoses, pump and CDS sensor, in that order. | — | Fix → |