Ariston Oven Error Code ER08

ER08 means the oven's control board has detected a disconnection or short circuit on Potentiometer 1, the sensor linked to a control knob. The board cannot read a valid signal from this component and shuts down to avoid operating at an incorrect or unknown setting. On Touch control Ariston ovens, this code should not appear at all, and if it does, the control board itself is the likely source of the fault.

You should not continue using the oven while ER08 is active. The error means the control board cannot correctly read the knob position sensor, so the oven may not respond to your temperature or function selections accurately. Operating the oven in this state risks incorrect heating behavior and potential safety issues.

Repair costs depend on which component has failed. A replacement potentiometer typically falls in the range of $15 to $50 for the part alone, while a main control board can cost between $80 and $200 or more. Adding professional labor, total repair costs generally range from $100 to $350 depending on the fault, the specific model, and your location.

Some causes of ER08 are accessible to a confident DIYer, such as reseating a loose connector or cleaning corroded terminals. However, replacing the potentiometer or main control board involves working with internal oven wiring and components, which carries electrical hazards. If you are not comfortable with appliance disassembly and safe disconnection of power, a qualified technician should perform the repair.

A power reset may temporarily clear the error display, but ER08 will return if the underlying fault with the potentiometer or its wiring has not been corrected. A reset does not repair a failed component or a broken wire. The fault must be diagnosed and the defective part repaired or replaced to permanently resolve the code.