[mkharley21]

My '92 se-r is cold natured and takes forever to get to normal temp on cold mornings. The heater can not even be turned on until the engine temp is at full normal or else the heat will go cold and the engine temp hand will go all the way back down to cold. Anyone ever have this problem before? Could it be the thermostat?

 

[nastynissan]

Id definetly replace the thermostat as a first try.... there are other things it could be but do the cheapest/ easiest first....

 

[Sethticlees]

^ Ditto! Replace the thermostat.