I am receiving a fax error code but don’t know what it means

When a fax fails, it might give you a fax error code consisting of two characters (such as 37 or 4A), instead of telling you what the actual problem is in plain English.

An example would be  “Communication Error (37)”.

The code has a purpose and meaning, and you may check it is against the fax error code table.

The error code table is available here