197 degrees Fahrenheit , according to fordparts.com
A 2002 Ford Explorer would have come from the factory with approximately a ( 192 * Fahrenheit engine cooling thermostat )
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)
Your thermostat might be stuck open
According to one of Fords websites : A 1995 Ford Explorer , 4.0 liter EFI , V6 engine takes : ( the Motorcraft RT-1086 engine cooling thermostat , 197 * Fahrenheit )
The engine temp gauge is in the instrument cluster and the sending unit for the temperature gauge is in the intake manifold just to the left of the thermostat housing when you are looking from the front of the Explorer ( the larger sending unit to the right of the thermostat housing is for the EEC IV system)
that is probably an oil pressure switch that you see. coolant temp sensor is usually near the thermostat in the manifold.
possibilities include thermostat stuck open (temp gauge would be reading cold), low coolant level, blockage in heater core, or temp door in dash broken(very likely on this vehicle)
fuel gauge stays on full and the tempreture does not move from cold on ford explorer 1998
190 Fahrenheit / 88 Celsius
The coolant temperature sending unit for your engine temperature gauge is located on the intake manifold just to the left of the thermostat housing ( when looking from the front of the Explorer ) The larger sending unit to the right of the thermostat housing is for the EEC - IV system
my outside temp diplay is inop