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OK, you know the fans are good because the work when the A/C is on. So the problem is elsewhere. As you know, there is a temperature sensor that signals the fans to come on when the cooling system gets warm. You replace it, but is the wiring OK. Check all connections. The fan control module/relay may be faulty, have you checked it? THE PROBLEM WAS I NEEDED A DEALER COOLANT TEMP SENSORS

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Q: 99 venture and my cooling fans don't work coolant senor has been replaced and if you turn ac on fans work?
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