Documents cannot be produced when Canon Printer support code b504 is encountered. The printer displays an error message. Contact Canon Printer Support if you experience the same issue with your Canon printer. This error code prevents the print head's fragile electronics from self-destructing or overheating. As a result of this issue, it becomes impossible to maintain the print head cool for a lengthy amount of time. Problems with printing occur when the print head loses heat. Therefore, fixing this issue will ensure error-free printing.