What to do if my Riello Array AR 3000 Boiler displays HIGH_TEMP_ERROR?
- BBarbara HessAug 27, 2025
If your Riello Boiler displays a HIGH_TEMP_ERROR, you can try the following: 1. Change or restart the pump. 2. Open the valves on the hydraulic circuit. 3. Check the temperature sensor's resistance values and replace the sensor if the values are incorrect.









