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Cooling fans run continuously

1342 Views 3 Replies 2 Participants Last post by  rhartman52
I own a 2015 Chevy Malibu and I've noticed the cooling fans run from the moment I start the car and keep running for 3-5 after shutting the car off. I replaced the coolant temperature sensor and that didn't fix the problem. But let me backup a bit. This problem seems to have started one day when I started the car and the display on the instrument panel said engine was overheating and to let it idle or something to that effect. But I knew the engine wasn't overheating because it was cold when I started it and the message appeared right away, before the engine was even warmed up. This "overheated engine" display went on for the next hour or so as I drove from place to place trying to find someone to work on it. Then it just stopped. However, I noticed the temp gauge wasn't working, I had no a/c, and my check engine light was now on. After a few days, I disconnected the ground from the battery and reconnected it and this when routine started over again. Next I replaced the coolant temperature sensor and that didn't change anything. Any ideas/advice on how to fix this issue?
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I actually took the car in to the auto repair shop and they ran a diagnostic check. Here's their finding:

Coolant housing on rear of cylinder head is leaking causing coolant level to be low and making cooling fans to run constantly.

I don't think this is the problem. Before I took the car to the shop, I checked the coolant level and it looked fine. After leaving the shop, I checked it again, noting it was full. I've checked numerous times since then and the level of the coolant in the coolant reservoir has not moved.
I should add that there was no work done on the car other than the diagnostic check. Although the shop said I had a coolant leak, I didn't have them fix it. In my opinion, it wasn't and still isn't leaking.
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