Question about 2010 Chevrolet Impala LT
A/C stopped blowing cool message turn a/c off engine hot. Temp gauge on cold, normally at center. Reserve tank low but not empty. Coolant overflowed when radiator cap removed. Not low on coolant. Engine did not seem to be hot. Scanned, removed code, still showed message. Replaced thermostat, still showed message. Replaced switch (sorry don't know name) still got message. Next day message gone. Drove five miles on 85 degree day, message came on less than five miles in and a/c blew warm.
You need professional help
Have a local shop resolve
Posted on Jul 01, 2013
Testimonial: "No shit Sherlock. They don't make em like they used to. Maybe I'll try a FORD! They didn't take a bail out and seem to be trying harder. A bunch of people with the same car, same problem, no answers. Sigh."
there is a switch in the engine intake or cylinder head that controls the cooling fans. The switch is the one with only 1 green wire hooked to it. Turn the key to run, with the engine stopped pull this wire off and touch it to a ground( cylinder head, engine block) and the fan should start, if not look at the fuse, if it does you need to replace the switch.
Posted on Mar 14, 2010
When an engine is overheating and then the temp drops on the guage, it's usually a sign that the coolant is not touching the temp sensor. There's no coolant in the engine. Putting water in the overflow tank won't solve this. Take the radiator cap off after the engine cools and put coolant in the radiator. you might have to crank the engine and do this several times, as the engine can develop air pockets that won't allow the coolant to travel inside the engine. If you don't see any leaks, and it still uses coolant, you've probably got a blown head gasket. Check for water on the plugs, check cylinder compression. If it slowly uses coolant, try putting a large box of pepper in the radiator or some of that radiator seal copper flakes.
Posted on Dec 22, 2008
Probably the temp gauge itself. Most of the time it doesn't have a problem but sometimes they do go bad. Did the car ever overheat prior to changing the solenoid?
Posted on Jul 30, 2009
SOURCE: Faulty warning light
You will see a switch with a wiring connector plugged into the radiators side tank at the right side. That is the low coolant switch
Posted on Apr 03, 2010
Testimonial: "Thanks. It was difficult to see, even knowing where it was. Thanks again. "
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