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Errors


Boiler type UFT-140W

Error code Er28

Cause:

Overheat Sensor Open or Short

Solution:

This Error Code will go away when CH temperature decreases.
If Error happens again:

-Check overheat temperature sensor. Ensure connections are secure.
- Check overheat sensor resistance. If resistance is zero, replace the sensor.
- If the problem persists, replace the main control.