2006 Cobalt 2.2 radiator fan doesn't come on. Any help diagnosing would be appreciated.

10

Asked by Jun 20, 2017 at 10:17 PM about the 2006 Chevrolet Cobalt LS Coupe FWD

Question type: Maintenance & Repair

Radiator fan will not start automatically even when temperature is above 200F.  The temp. sensor displays the correct temp. and if disconnected it displays -48F and the fan runs.  Fan relay is good.  Can run fan from either relay.  Freon is bleed from AC so can force it to start by turning on AC. It tests as if the #2 relay has an open ground on the coil side.  Can't get access on #I relay to check it.

2 Answers

1,830

not the answer you want but you need to get to the other relay and inspect.

10

Have tested the relays out of the car and swapped out with one new one in both positions. No change. I don't have a wiring diagram for the coil side of the relays. I have 12V to coil side of the relays but the circuit is open somewhere on the ground side after the coil. Not sure what switch closes the coil circuit at temperature (ECM?). I think the set points are 190 for low speed fan and 195 for high speed fan. I don't have wiring diagram. Could the temperature sensor or a connection to it being faulty cause the fan not to engage yet provide the correct engine temperature. This started with a stuck thermostat a couple weeks ago and the fan was working fine so I wonder if I did something inadvertently to the fan control circuit.

Your Answer

Chevrolet Cobalt Experts

  • #1
    lightGear
    Reputation
    1,200
  • #2
    munron
    Reputation
    1,150
  • #3
    dandyoun
    Reputation
    990
View All

Related Models For Sale

Used Honda Civic
709 Great Deals out of 53,606 listings starting at $1,495
Used Chevrolet Malibu
1,091 Great Deals out of 58,201 listings starting at $995
Used Chevrolet Impala
557 Great Deals out of 33,311 listings starting at $1,499
Used Toyota Corolla
889 Great Deals out of 65,104 listings starting at $1,500
Used Ford Focus
706 Great Deals out of 64,408 listings starting at $999
Used Ford Mustang
445 Great Deals out of 42,042 listings starting at $1,488
Used Honda Accord
925 Great Deals out of 78,232 listings starting at $1,295
Used Toyota Camry
1,110 Great Deals out of 76,499 listings starting at $1,400
Used Dodge Charger
458 Great Deals out of 34,934 listings starting at $2,000
Used Chevrolet Cavalier
757 listings starting at $427
Used Ford Fusion
1,079 Great Deals out of 61,608 listings starting at $888
Used Pontiac G6
32 Great Deals out of 3,840 listings starting at $1,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.