Question about 1993 Mazda MX-6

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I have 93 626. bought engine and installed. ran good till fan came on then very poor. changed temp sensor, sensor switch,and now fan comes on when ignition is turned on. will not run. HELP

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Fan relay needs replaced

Posted on Dec 31, 2010

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Posted on Jan 02, 2017

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The car is overheating and the fans are not coming on. I changed the coolant temperature sensor still not working. I also jumped the fan they were working relay everything is good. No leaks.


What make , model an year vehicle ? The PCM / ECM engine computer controls that relay . The best way to diagnose this is to hook up a scan tool an see if the PCM / ECM can control ( turn on ) the relay ! I'm going to ask a silly question , what are you going by to determine the vehicle is over heating ? The Temperature gauge . Temp. gauges do go bad . Hooking up a professional grade scan tool that can read engine sensor data PID'S is the way to see what the PCM/ECM is seeing as far as engine temp. Most vehicles the cooling fans don't come on till 200 to 220 degrees ! You could buy a temp gun at harbor freight an see what the temp is at the upper rad. hose .

Feb 04, 2016 | Cars & Trucks

1 Answer

Egine is cool no fan comes on... OK... Engine heats up, no fans come on. Not OK... Red light comes on and engine starts to over heat.... If I turn the Air Conditioner on both fans come on and you can...


There is a fan control module in the engine compartment that you could try replacing. Rather than replace the temp switch, you could try shorting it's connector terminals just to see if the switch is the problem.

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Sep 23, 2010 | 2000 Volkswagen Beetle

2 Answers

JUST PUT NEW RADIATOR IN ,OLD ONE CRACKED ON SIDE. ALL HAS BEEN REPLACED BUT THE RAD. FAN WONT CLICK ON. CHECKED THE FAN CONNECTION,ALL OK.RAN CAR TILL TEMP. RAISED TO ALMOST 1/2 WAY,STILL NO FAN.CAR IS...


ok take a jumper wire and hook it up to battery then to fan see if fan is working ok and not the motor burnt up then there is a fan relay switch test that see if it is working

Sep 12, 2010 | 1995 Buick Skylark

2 Answers

Engine cooling fan does not come on, but if you unplug the coolant temp sensor the fans will come on


You found the problem, bad coolant temp. sensor, replace it and it's fix.Hope this was very helpful.

Aug 26, 2010 | 1999 Chevrolet Venture

1 Answer

The radiator fan dosent run. i changed the relay


Does it not run at all? Or does it only run after the fiero gets really hot (like sitting in traffic on a 90 degree day)?


But a low-temp fan switch (sensor), which causes the fan to turn on at a much more reasonable level. I think the stock switch doesn't turn on till it reaches 235 degrees or something.

The switch/sensor is located near the top of the engine (on passenger side end of engine area, opposite end of the throttle body).

Buy it here (or other places have them too)
http://www.rodneydickman.com/n20.html

You should be able to see where it installs by matching up the new part with the old, pretty easy operation. A little coolant might squirt out, so only do this when the engine is cold.

Hope this cures it

May 07, 2010 | 1986 Pontiac Fiero

2 Answers

Radiator fan won't turn on -fan is good -relay is good


radiator fan switch. it is a coolant temp sensor near the thermostat goose neck that tells the computer to turn the fan on! good luck! is the check engine light on?

Sep 18, 2009 | 1996 BMW 318

1 Answer

RUNS GOOD STALLS AT DIFFERENT TIMES; ae. STALLS HOT OR COLD


when you removed the water pump, did you disturb the timing in anyway ???

Jun 21, 2009 | 1992 Oldsmobile Cutlass Ciera

2 Answers

Audi A3 2001 radiator fan ruuning all of the time


yeah try to change the sensor.maybe it is busted. normally, most of the late-model cars comes with a fan feature that turns of after 5 or 10 mins even after switching off the engine. this helps to cool down first the engine to reach its desirable temperature before it is totally shut down. its good that your radiator fan has a feature like that. aftermarket perfomance fans do come with that feature because it takes care of the engine state.just try to change the sensor for engine temp

Feb 24, 2009 | 2004 Audi A4

1 Answer

I am trying to change coolant temp sensor


have you checked you fueses and relays?
the coolant sensor is located Under hood, driver side, rear engine area, mounted on intake manifold clearpixel.gif

Oct 27, 2008 | 1997 Cadillac DeVille

1 Answer

Cooling fan wont work


The water temp sensor is located near the thermostat housing. This sensor is what tells the ECM to turn the fan on/off. The water temp sending unit is located near the same area. You know you have the correct sensor is because the water temp sensor has a 2 prong plug. The water temp sending unit only has 1 prong.

Sep 26, 2008 | 1998 Chevrolet Cavalier

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