Well, I have been experiencing this particular issue with my car for a little while now. And no one can figure out why it's acting like this. SMH.
I recently had a brand new thermostat installed in my car, along with a brand new radiator. I wasn't able to drive my car soon after because someone rear ended me and I was left out of a car for a month. I drove it for a few days and I noticed it was running a little hot. Not extremely hot, but a little hotter than normal. Then, one day, it COMPLETELY overheated. It's done this about 3 times since I had those parts installed. The "low coolant" indicator light would come out and sometimes it'd go off. And sometimes it won't. I fill up the radiator with coolant and water, depending on what type of coolant I buy (concentrate or pre-diluted) and I still experience the same issues. It's not a head gasket. We ruled that out.
Someone told me it MIGHT be a faulty thermostat and it's causing a lack of coolant to reach the engine. Which would make sense. But doesn't explain the low coolant. I have no idea what to do about this and it's getting on my last nerves, LOL. Any suggestions?
Sometimes the needle fluctuates, depending on where and how I'm driving. Most of the time, it's at 210.