overheating
my 2006 cobalt ls has been at a solid 196 degrees ever since i got it. For the past week I've been
noticing that the temperature is rising and falling with a difference of 20 degrees. For example. I'll be
driving(5th gear) and if my car has no heat on, no air conditioning on, it will teeter between 187-
199. When I'm stopped, it will rise steadily( the highest it's gone while driving is 207) until I start to
take off again. Then it will fall back down and teeter. When the heat is on, the temperature rises.
When the air conditioner is on, is will maintain between 199-205 I have had the thermostat replaced
already and the fan works( yesterday when the mechanic was looking at it he revved the engine
and it got up to 227 before the fan cut on. But today when I tried to rev the engine to see if the
temp would rise, but it didn't. it fell. What is this?
