Dodge Stratus 1999 no heat temp guage spiking

It could be low coolant, or frozen coolant. If frozen, you need to to get the vehicle into a warm area before major damage happens to the engine block, radiator or other components. Check that first. If it isn't frozen, make sure it is full. If the coolant is unfrozed and full, next check the t-stat. On our homepage under the DIY section are directions for checking a t-stat.