Engine Mechanical problem
2003 Toyota Camry 4 cyl Manual 143000 miles
my 2003 camry thermostat indicator reads high but there is no smoke smells or noise. The car seems to be running ok. This just started this morning but i'm hesitant to drive it because I dont know if there is something more seriously wrong with it. No vibration, or engine shut off. I did notice that the heat output was not as warm as it normally is with the vents open.
It is a good thing that you didn't drive after realizing the problem. From your description, your thermostat is stuck closed. Thermostat is not that expensive. I would replace it if it has not been done in the past a couple of years.