Temperature gage reading hot--cold air coming out heater vents--- -4degrees
check fluid levels, but it sounds like a stuck thermostat.
Try changing the selector to Def ... is the air any warmer? If it is than your Diverter door (mixer) is stuck. It may even work if you put the vent to blow lower (at your feet) . Once you get something coming out start to change the selector positions back and forth to see if it activates the vent door. This cold is really doing a number on these newer vacuum actuated systems .... Momma Mia , it;s a Frio!
Thank you so much for the help
Looking for a Used Tercel in your area?
CarGurus has 37 nationwide Tercel listings and the tools to find you a great deal.
Search Toyota Tercel Questions
Toyota Tercel Experts