Alto-Shaam E21 Error Code
Cavity probe fault - temperature probe defective
Stop searching through PDFs. Our AI assistant on WhatsApp is trained on official Alto-Shaam documentation and can diagnose this fault code and guide you through the repair in minutes.
5-day free trial — no credit card required.
Other Alto-Shaam Error Codes
Low water in boiler - probe not satisfied in 5 min
Control compartment temperature high (above 176°F)
Fan motor error - did not spin within 60 seconds
VFD communication failure
VFD error - blower fan speed/rotation issue
Convection temperature high - exceeded 572°F for 25+ sec
Boiler temperature high - above 248°F for 25+ sec
Core probe fault - single-point probe defective
Drain pump failure
Venting error - vent switch misalignment
Steam temp high - exceeded 395°F in steam/combi mode
Gas ignition failure (gas models)