Testing a thermocouple-based RF ablation system iscarried out by connecting a temperature simulator to an ablatormodule. The ablator module is operative to vary aradiofrequency power output thereof in a predefined manner inresponse to predefined variations in a temperature signal fromthe simulator. The method is further carried out bydelivering RF power from the ablator module to the temperaturesimuator, and while delivering RF power, performing the stepsof: communicating temperature signals from the temperaturesimulator to the ablator module, varying the communicatedtemperature signals, and verifying that a variation in thepower output of the ablator module in response to varying thetemperature signals conforms to the predefined manner.