engine cooling fan problems

Maqcro1 said:

you should start your own thread. Also what engine do you have?

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1.4 Turbo. I have a 2014 Cruze LT. Figured it was roughly the same issue as talked about in this thread. I replaced both sensors, coolant reservoir given i couldnt get a cap separate, and thermostat. Also replaced two of the 5 fan relays since the other three are not available anywhere. Fan didnt come on till 230 at first. However it is coming on A little sooner now but idle temp at 203 presently after a half hour. Was up to 230, dropped to 225, then fan came on at 228, then dropped to 220, then fan came on at 226 and so on so far. Presently in between 198 and 215. That was without AC on. Now running AC. Did fine stayed in the 198 to 215 range. Then turned off AC. Fan went back to coming on right at 230. Temps staying between 220 and 230. But so far no high speed fan mode. After the thermostat and sensors but prior to the two relays and coolant resevoir with new cap, its doing better but still not as it should be.

CruzeEcoBlueTopaz said:

I drive up a 2500ft mountain everyday and I always keep an eye on my coolant temp. I notice my coolant temp always gets up to about 230F which is about when the fan turns on. I know this because I will watch the coolant temp immediately decrease to about 222F.
　
Strange I didnt realize there were different speeds for the radiator fan... im assuming there is high and low then ? If so its strange your fan will work at low but not high.

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Is your fan coming on full and then shutting down? There are 3 levels of fan. If you fan is cycling between off and full the the fan resistors may need to be replaced. Check out the Youtube channel South Main Auto to see how this problem is diagnosed and handled.

David D said:

Having similar issue with my 2014 Chevy Cruze LT. Fan comes on at 230. I replaced thermostat. Will run ok for a few days then coolant gone again. No evidence of leak. appears to be boiling out of over flow reservoir slowly. Can see coolant vapor at coolant tank vent. Fan goes to jet mode once this occurs. Seems cooling fan is coming on late, consistently at 230F (per temp in obd2 reader), and after enough cycles coolant isnt cooling enough and it boils out. It has four different relays for cooling fan no one seems to have in stock, Low and high speed fan ranges do come on yet at 230 which is too high. Given the number of people having this issue one would think GM would step up to assist. My Cruze has 121000 miles. Does anyone here have thoughts on this?

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I'm having the same issue on my 2012 1.4turbo sonic. The fan is not coming on when a/c is engaged. Radiator fan only comes on when OBD reads temps of 230 as well. I just had the fan replaced a year ago too. Did you ever figure out the issue? I was thinking maybe its a relay for low speed or something.