temperature guage not reading

[92explorerdstap]

I have a 92 explorer 4wd automatic...my water temperature guage only reads cold, yet my heater heats up fine...could this be the thermostat? everything else works fine

 

[fishwish3]

wont be the thermostat, try the temp sending unit, hope this helps

 

[92explorerdstap]

thanks man ill check that out

 

[ExploringNC]

temp sending unit, about $6. Make sure Ex is cooled down and relieve pressure by taking radiator cap off. I've learned the hard way.