Operating Temperature Sensor or D H W S e n s o r d e t e c t s W a t e r Temperature Greater than 199°F (93°C
This Error Code will go away when the DHW temperature decreases. If Error happens again:
1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2. Check if DHW pipe is blocked. Ensure there is enough water flowing to the water heater.
3. Check DHW sensor at DHW outlet. If resistance is zero, replace the sensor. 4. Check Operating Temperature sensor at the heat exchanger. If resistance is zero, replace the sensor.
5. If the problem persists, replace the main control.
