What does error e-20 mean on my Alto-Shaam HALO HEAT ECOSMART 500-1D Warming Drawer?
- MMarc JohnsonSep 3, 2025
If your Alto-Shaam Warming Drawer displays error code e-20, it indicates that the product probe is shorted. The oven will cook in time only. Verify sensor integrity. See sensor test instructions below.



