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2003 ford focus zetec 2.0 fans wont come on unless a/c is on. where is the temp sensor or fan switch?

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The cooling fans are controled by the engine computer, they are not directly controled by a sensor or switch. If the fans are not energizing you will need to have a scanner to test the electronics to determine why the fans do not come on. However if you turn the a/c on the fans should energize and you could test for power at the fan if power is present then the fan has failed. Please rate this answer this will help me out Thankyou RJ

Posted on May 30, 2010


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I have a 2000 ford focus 1.6i zetec can you tell me where the coolant temperature sensor is located please

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Mar 28, 2014 | 2003 Ford Focus

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My 2003 ford focus stalls out when i turn on the defroster or the air. the fan never comes on to cool the engine. we tried to find the temp sensor but we couldnt find where its located

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1 Answer

Hi there. 2002 Petrol Ford Focus Zetec 1,6lt Automatic . Radiator was boiling over and the cooling fan is not engaging. I have checked thermostat, fuses etc and all seems fine. The local garage here in...

I have the U S wiring book. It may be similar to European version. I will look at work and see. Does the cooling fan come on when you turn on the a/c and the compressor clutch? The fan should cycle with the a/c clutch. Also, do you have 12 volts at the motor connection when the car is hot? There should be a big fuse in the box under the hood and probably a relay.
ALso, the ECT, engine coolant temp sensor on the engine should also tell the computer to turn on the fan when the coolant hits a certain temp.

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1 Answer

Ford Fiesta Zetec 1.4 After switching off the ignition, even after very short journeys the radiator fan motor continues to operate for up to 1 minute, is this normal, it never did it before, your help...

the temp sensor is right at the top of the head,so if the engine gets up to running temp (even though the rad is cool)it thinks it has a hot spot,so the fan comes on for a minute.then as the "hotspot "goes,the fan switches off.its not a problem unless the fan stays on,then change the sensor.

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2 Answers

I can't locate the coolant temperature sensor

I had same problem. located above/behind the Right Front Tire. I didn't believe it either.

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1 Answer

What type of engine oil for 1.6 focus zetec 2003

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Focus 2002, A/C fan does not work on settings 1-3

common problem, replace the blower motor (fan) resistor, this is what controls the fan speed,its located on heaterbox next to blower motor.heres a picture of it,its on the rightside of dash toward the bottom. hope this helps.852ab4f.jpg

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1 Answer

Ford focus 2003

Hi hypajunior, Check your coolant level ensure you have power to the fan (I am assuming it is an electric fan) if you have power to the fan you may want to check your thermostat or the coolant temp sensor,it will be a thread in fitting with a plug attached to it hope this helps good luck to you

Oct 25, 2008 | 2003 Ford Focus

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