Temperature Gauge Troubleshooting

Change out your thermostat. Cheap part and easy to do. Most likely the problem since it's affecting your heat.

Thanks for your answer. I did purchase the thermostat along with coolant and when I checked under the hood the coolant reservoir was empty. I filled that up and have been checking every day since and all seems well. The reservoir emptied about half way since and the temperature hasn't gone above the half-way point, while the heat is working as expected. Looks like it was simply my coolant level was too low. I will keep an eye on it because I'm not quite sure why I'm losing coolant. I'm not seeing anything in any parking spaces so it doesn't look like I'm losing it that way. Thanks again.

I've got an '01 Camry as well, and had a somewhat similar situation recently. Mine was traced to a hairline crack at the top of the radiator, in the plastic section. When the car would get hot, and the radiator would pressurize, the fluid would dribble through the crack and evaporate gradually. The leak was not dramatic enough for the coolant to pool beneath the car and become obvious. Eventually, I replaced the radiator and the coolant level has held steady. I would advise a thorough inspection of the plastic radiator cap, both at the front AND rear, as mine cracked in both places.

I have the same problem. Brand new radiator and thermostat. Any ideas?

tbmitche, that's what turned out to be my problem. I replaced the radiator and it's been fine ever since. I've now got over 293,000 miles on it and still going.

Rasecx, buy a block tester kit. Very easy to use. It will let you know if your head gasket is going. That is a possibility if your coolant is disappearing. https://www.youtube.com/watch?v=YY2w2QvwAVo