Ariston Cooktop Error Code E.73

E.73 indicates a communication delay between the cooktop's main control board and its Communicating Generator, the component responsible for driving the induction cooking zones. The cooktop detected that data exchange between these two parts did not occur within the expected timeframe. This causes the unit to halt operation as a safety precaution. The fault can stem from a temporary glitch, a wiring issue, or a component failure.

No, you should not attempt to operate the cooktop while E.73 is active. The error indicates the control board cannot reliably communicate with the generator that controls the cooking zones, which could result in unpredictable behavior. The cooktop will typically disable the cooking zones automatically when this error is present. Attempt a reset and only resume use if the error does not return.

A homeowner can safely perform the initial reset by turning off the cooktop for 5 minutes and restoring power. If the error clears and does not return, no further action is needed. However, inspecting internal wiring harnesses, testing supply voltage at the terminal block, or replacing the Communicating Generator or control board requires disassembly of the unit and carries electrical risk. Those steps should be handled by a qualified appliance repair technician.

A reset is the first recommended step and will clear E.73 if the cause was a temporary electronic or firmware glitch. Turn the cooktop completely off at the power source for at least 5 minutes, then restore power. If the error reappears immediately or after a short period of use, a hardware fault such as a wiring issue or failed component is likely and further diagnosis is needed.

If the issue is resolved by a simple reset, there is no cost involved. If a technician visit is required, diagnostic service fees generally range from $75 to $150 depending on your region. Replacing a Communicating Generator module or a main control board can add parts and labor costs ranging from $150 to $400 or more, depending on part availability and local labor rates.