Operating temperature sensor detects water temperature greater than 203°F (95°C)
Press the Power button to clear the Error Code.
If Error happens again:
1. Check if dip switch Max Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2. Check if CH inlet pipe is blocked. Ensure there is enough water flowing to the appliance.
3. Check Operating Temperature sensor at CH heat exchanger outlet. If resistance is zero, replace the sensor.
4. If the problem persists, replace the main control
