ErrorHelp.us

Heating  Heating

Brand

Wiliamson Wiliamson List all brands

Type:

FS-120LPFS-120LP
List all types

Error code:

FAULT 66 =
List all errors


Error code: FAULT 66 =

Cause of error code FAULT 66 =

Firmware doesn’t match

Solution for error code FAULT 66 =

Firmware doesn’t match. This error condition is stopping the boiler and to get to the normal operation again, it is necessary to re-program the device or to replace it.


Share this page: Facebook Twitter





© 2025 ErrorHelp.us