The Temp sensor is connected to the batteries either ON the case of the battery or on the terminal. Trace Inverter/Chargers from your year model were notorious for malfunctioning. You really need to replace it with a current Xantrex model. The purpose of the temp sensor is to monitor the heat when charging to prevent boiling of the battery's. You can disconnect the sensor from the Inverter/Charger. It is not really required, but that will not fix the charging problem. You could attempt to find parts for a 13 year old Trace, but I doubt Xantrex would still have them. The fan is a cooling fan and will be ON whether in INVERT mode or CHARGE mode depending on the internal temp of the Inverter. Even when the Inverter is OFF, it is still in charge mode and will charge as needed and will cause the fan to operate. You need to determine if the error is the Heat of the internal Inverter that is the code or the Battery sensor. Usually a Overheat code on a Trace is the battery sensor system. The fan is easily replaced by any aftermarket similar fan that fits the space. Doug
