2007 international gauges

The gauge could be toast, but it will read what the engine is telling it. If the engine coolant temp sensor is reading wrong, and sending the wrong information, the gauge will therefore read wrong. If it is maxing out over temp even though the engine is physically still cold, there are a couple of things to check. If the coolant temp sensor is faulty, or over temp, the Check Engine light or Warn Engine lights should be on. The other issue is possibly corrupted body controller and/or cluster. Try a quick reboot. To do this simply disconnect all cab battery power for a couple minutes and retest. To rule out a faulty cluster, if you have access to another similar truck, try swapping cluster to see how a test cluster responds.

 

The cluster gets its engine information from the J1939 data link. If the temp sensor was faulty you would have a check engine light on. Disconnected the power for a couple minutes and reconnect if that does not fix it then the gauge is faulty.