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Radiator fan fun does not switch off

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  • Brian Goemans Nov 28, 2012

    I have disconnected all the sensors, one by one, fan still runs. I pulled out 2 relays above the fuse box - each stops the fan, but they test ok !

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  • 318 Answers

If sensor is to an earth activated relay then there must be a short to earth in the wire from the sensor to relay

Posted on Nov 28, 2012

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1 Answer

Radiator fun running non stop


sounds like the fan motor relay switch its attached to the fan housing unit, or your thermostat is stuck open. refer to you car bible for instructions on how to test your termostat to see if it functioning properly. Hope this was helpful.

Mar 20, 2013 | 1998 Toyota Corolla

1 Answer

Radiator fan running nonstop


Hi Bro, Have you check one single wire to switch temperature, if this unplugged the fan will run nonstop, even without your engine start and your key is in "ON" position, it's exactly what happen to my 1994 corolla
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Mar 20, 2013 | 1990 Toyota Corolla

1 Answer

What Switch or control makes the radiater fan come on? and need the diagram for the radiator control switch, 1993 saturn sl2.


Ok. The way your system is set up,you have a fan switch located in the engine block,usually near the top.That fan swtich sends the voltage to the fan motor or to a fan relay then to the motor.You can jump the fan motor directly to make sure the motor itself is not burned out by unplugging the motor and running a jumper wire from your battery pos terminal to the terminals on the fan motor itself..If you have checked the motor and it does work,then the easiest thing to do is simply replace the fan switch.You should have a Coolant temp switch and a radiator fan switch and possibly and Radiator fan relay.I would try the radiator switch first,then replace the relay.The coolant temp sensor is for the computer and usually doesnt tie into the radiator fan switch.try that and repost.Good luck

Aug 23, 2011 | 1993 Saturn SL2

1 Answer

Over heating


When the car overheat that means you have a bad radiator fan , Thermostat,leaky head gasket, bad water pump Or low on coolant fluid. So check those one by one starting with the radiator fun. Good luck

Dec 18, 2010 | 2003 Dodge Caravan

1 Answer

Can't pull the radiator uot of my 1999 BMW 528i, t...


You gotta remove the fan and shround. Fan nut is 1.250" wrench. Fan nut is left handed thread. this means rightey loosey, lefty tightey. Go get the special tool to hold the fan pulley bolt heads. While you are turning the fan nut clockwise to loosen the special tool holds two of the fan pulley bolt heads to keep the fan pulley still. And voila, off comes the fan. then you can remove the shroud with it. Then you can remove the radiator. Fun job. I've got it down to 8 minutes.

May 19, 2010 | 1999 BMW 5 Series

1 Answer

Cooling fan problem


NO DON'T!!!!!!!!!!! You'll blow it up! Go to someone like Forddirect who will get you the fan without changing the rad. What is cheaper, a radiator from a scrappies, or a new engine? They are set up for a reason, not for fun. Good Luck.
Forddirect.co.uk
Regards
Dave

Oct 09, 2009 | Ford F Cars & Trucks

1 Answer

Thermo fan on radiator wont turn off


It wont hurt anything if they stay on all the time cus the fan will mostly runs off your alternator. But if does bother you then it meant be the sensor on the fan. Or you can install a switch to turn the fun off and on with a toggle switch. But its up to you. But for the most part as long as the fan keeps going to cool off your radiator you should be ok. But i am thinking it maybe the sensor not telling the fan to shut off and turn on when its suppose to.

May 04, 2009 | 1991 Toyota Camry

1 Answer

Overheating 97 V6 pontiac grand am


1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed grey_line.gif 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). grey_line.gif 8 Inspect Water Pump Damaged, worn or leaking water pump. grey_line.gif 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. grey_line.gif 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. grey_line.gif 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. grey_line.gif 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. grey_line.gif 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders

Dec 01, 2008 | 1997 Pontiac Grand Am

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Car is overheating


2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed grey_line.gif 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). grey_line.gif 8 Inspect Water Pump Damaged, worn or leaking water pump. grey_line.gif 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. grey_line.gif 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. grey_line.gif 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. grey_line.gif 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. grey_line.gif 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders here is a list of things to check Shaun

Nov 17, 2008 | 2000 Cadillac DeVille

1 Answer

Thermostat


You must to remove the timing belt to get to the engine thermostat.
The termostat is located behind the timing cover.
Acessing the termostat is not an easy tast, as you have to remove the timing belt to get at it.

If instead you are talking about the radiator fan termic switch, you find it mounted on radiator, where fun wirings get plugged in.

Regards

Aug 29, 2008 | 1996 Audi A4

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