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Errors


Boiler type Enduro TI ETI-1000

Error code F21

Cause:

Water level in the boiler is low.

Solution:

- Check boiler feed water system to be sure it is supplying make-up water to the boiler system.
- Ensure all air is bled from the system.
- Check for leaks in the boiler and system piping and repair as necessary.
- Inspect low water cutoff probe and wiring for damage and repair and replace as necessary.