6f5f31d5_Printer_Error_Code_Information__Solutions
[Error Code] Error 923 [Error Message] Fuser is too hot while printing or when idle. • Short in the thermistor circuit. • Noisy thermistor signal • Fuser is actually overheating due to hardware faults. [Solutions] 
Most cost effective solution is to replace the fuser Lexmark Fuser Pricing
Lexmark Printer Error Code Information
Solutions