HomeForumsMitsubishi ElectricFault CodesMitsubishi 4260 Error Code This topic is empty. Viewing 1 post (of 1 total) Author Posts August 3, 2024 at 11:16 am #1697 TheAChubKeymaster Premium Code Text Description Cause Check Procedure 4260 Preliminary inverter heat sink overheat protection. Reduced airflow through heat sink. Fan motor problem. THHS thermistor problem. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In