nissan is not different, they are designed to stay open when they fail... but you gotta remember if it's made by man it's gonna fail even if it's a fail safe.is the Nissan thermostat different than the rest of the automotive world? most if not all thermostats are now designed to fail in the open position, not the closed. OP have you checked the coolant level?
did the temp rise while while moving or while at a stop light?My truck started running hot today, needle pointing at the H, it has never gone that high, it usually points below the thermometer. 05 NISMO KC with 98K miles