Stiebel Eltron · Accelera 220 E / 300 E
Stiebel Eltron Accelera 220 E / 300 E error code 16
What it means
Short circuit impressed current anode / protective anode failed
How it shows: Service (wrench) symbol continuously illuminated
What Stiebel Eltron says to do
Immediately inform a qualified contractor, as the appliance is not protected against corrosion if the impressed current anode is faulty.
Last checked 2026-10-03.
Safety first
- WARNING Electrocution: Do not insert objects through the grille into the interior of the appliance. Never spray the appliance with water. Never spray water into the appliance. (pg. 16)
- WARNING Injury: Maintenance work, such as checking the electrical safety, must only be carried out by a qualified contractor. (pg. 17)
From the manufacturer's manual for this series.
The same code on other models
Codes mean different things on different heaters. Match the series to the model number on your rating label.
- Bradford White AeroTherm Series G2: 16
- Stiebel Eltron Accelera 220 E / 300 E (earlier manual edition): 16