It is a two wire sensor next to where the upper radiator hose attaches to the engine.
Red 5 year HOAT type.
Check the coolant level. Or, thermostat could be stuck in open position.
I have the same problem I am ready to jack the chrysler up and install a Toyota underneath it
The most common causes would be low coolant and inoperable radiator fan.
Green.
Red, 5 year, HOAT type.Red, 5 year, HOAT type.
Red 5 year
It is possible a little low on coolant and has an air bubble in the heater core.
From Chrysler it is a red five year. The aftermarket is Zerex GO5.
Coolant temperature sensor circuit high. Check the sensor near where the upper hose attaches to the engine to see if plugged in.
The 1999 Chrysler Sebring has an overflow bottle on the passenger side. The bottle has markings on the side to show low and high coolant marks.
The coolant temperature sensor is the two wire sensor near to where the upper radiator hose attaches to the engine. The outside/ambient temperature sensor is behind the front bumper, in front of the radiator.