Error code E05 on the Breville BOV800XL toaster oven is a fault code that indicates a problem with the oven's temperature control system. The purpose of this error code is to alert the user that there is a problem with the oven's ability to regulate temperature and maintain safe operating conditions. The specific cause of the E05 error code can vary, as it can be triggered by a variety of different issues, such as a faulty temperature sensor, control board failure, or wiring issues. However, the purpose of the error code remains the same: to notify the user that there is a problem with the oven's temperature control system and that action is required to address the issue.
My BOV800XL displays E05 and does not accept user input. I did a resistance/continuity check on the temperature sensor, where the connector meets the display panel (that's the easiest spot to get to the two wires going to the sensor). Mine read at 125k ohms of resistance. I think this is what E05 means, but I do not have a definitive answer on that. It makes sense that the device will not allow a user to use the device when the temperature sensor is faulty because it becomes very unsafe if it were to heat uncontrolled. I also checked the thermal fuse and it was fine. I also checked a lot of the control/power circuit board, and all the variable resistors (blue capacitor looking things) were fine, the triads (they have heatsinks) were fine, all the resistors were fine, and even the capacitors. Notably, those yellow capacitors are X2 capacitors, they are in series with the power (power on one end, power on the other, no ground), so follow their chunky traces to know the flow of higher voltage for any others...
