Question about 1995 Mercury Villager

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The fan that is to cool the engine only runs a few moments, and then quits allowing the vehicle to overheat. Then it starts missing to the point it wont keep running. Once it cools down, an hour or two later, you can start the vehicle again, and repeat the process. It was going abour 30 or 40 miles before stranding us on the side of the road...now only 10 or 15 miles. what can I do to get it going....

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  • Mercury Master
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I think you have a bad coolant sensor. is the check engine light on!! a bad coolant sensor symtoms are--poor cold idle, stalling, will cause rich mixture, retarded timing, slow idle speed, cold hesitation or stumble, poor fuel milage. the sensor sends info to ecm, and if it sends wrong info it will not run right. check for coolant leaks and check the fan relay, it maybe going bad. Another simple relay test is to shake it. If you hear something rattling inside, the relay armature is probably broken. the relay may not be closing all the way. so when it kicks off, the fans lose there power. if above is ok, then check coolant tempurature sensor and or thermostat. have a good day!!

Posted on Sep 12, 2010

  • carl Sep 12, 2010

    check the fan connections also.

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Change the fan relay & make sure your serpentine belt is in good shape. If not, change it. Make sure your fan blade is not siezed when hot. As it cools it may free up momentarily until hot, therefore you need to change the fan. Another thing that more likely is causing the problem is a faulty water pump. If the water is not circulating, the rad water will be cool & the sensor will shut the fan down. Check these things out & I'll bet this info solves your problem.Good luck!

Posted on Sep 12, 2010

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  • Master
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The temperature sensor is unservicable..........Hope this helps.

Posted on Sep 12, 2010

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I have a reznor ra235 and during cool down the burner motor and fan run.is this right?


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I have a 2002 lincoln ls it was running hot I needed a hydraulic cooling pump a thermostat and water pump replaced all of them and still running hot


Overheating on an older vehicle, especially one with high mileage, is not uncommon. Aside from the parts you mention, such things as fan clutch failure (or, alternatively, electric fan failure) can cause a car to overheat quickly at idle. If the car was poorly maintained, not enough antifreeze over a course of years may cause coolant channels in the engine block to rust shut, rendering the cooling system ineffective. Something as simple as obstructions to the front grille or rust clogging veins of the radiator can also reduce cooling capacity. A worn engine will also heat up very quickly under load.
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Here's something that's a very common cause of overheating, and it's easy to check.

How to test the thermostat in most vehicles;
Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
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1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
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2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.


What the thermostat does;
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from the engine into the radiator and reservior to be air cooled by the radiator fan.

I really hope this helps you.
Donnie

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