Question about Lexus LS 400

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1992 model. Why does it keep overheating?

The fans do not turn on

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Bad fan relay or temp sensor

Posted on May 16, 2015

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1 Answer

How to check if my fans work in my 1992 subaru impreza

I assume you mean engine cooling fans. The primary fan is bolted to the water pump and turns with the engine-always runs. The other fan is for when the engine begins to overheat. the coolant temp. sensor triggers it at high temp. You'll hear it kick in. My 1.8L Suby's have rarely utilized this electric fan. Be careful looking around under the hood. Both fans are right there on the front and ready to hurt you. If your car is overheating and this secondary fan has not come on, then it's not working. But you should look deeper to find out why the overheating is occurring-this fan is for "normal" overheating;long steep climbs etc.

Mar 16, 2014 | 1995 Subaru Impreza

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Car keeps running hot and fan will not turn

Please check your fan relay and sensor for malfunction. Otherwise you can by bass the the fan power to prevent your car overheating. Your car will get overheating if fan does not work of course.
Regards, Jay

Mar 02, 2011 | 1992 Lexus Es 300

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My sons truck keeps overheating. We used a head


Jan 24, 2010 | 1992 Toyota Pickup

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Fans wont starton my 1992 buick regal

First things to check would be fuse(s) at dash & under hood, as well as rad fan relay & possibly coolant temperature sensor.

Aug 13, 2009 | 1992 Buick Regal

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Have you tried the 8 mm bleeder screw on top of the thermostat housing? You may have air trapped behind your thermostat. Also, overheating can be caused by a collapsed lower radiator hose. If it's soft and you can squeeze it together, then under acceleration it closes down on itself thus preventing the flow of your coolant. Also check your radiator cap. It's supposed to be a 1.1 Bar cap but if it's not functioning correctly, by having to add coolant to the coolant reservoir bottle or the coolant overflow bottle overflowing, usually says it's the radiator cap. These are the simple fixes that you ,may have overlooked.

Good Luck,


Jun 05, 2009 | 1992 BMW 3 Series

1 Answer

Car overheating, fan won't turn on.

well first you will need to hard wire the fan to the battery to determine if the fan is good. then You will need to check the fuse/relay for radiator/AC fan. after that if necessary, check the engine coolant temperature sensor, could be faulty, this sensor tells the computer when the engine is hot enough to turn the fans on

May 27, 2009 | 1992 Mercury Topaz

1 Answer

My car keeps overheating

1. "When idle, the fan is not working" It should only work when the temperature reaches about 200 degrees. When idling it take some time to reach this temperature. Turn the air condition on and the fan will start right away.
If you turn the Air Condition on and the fan do not start then, the fan may be bad or the temperature sensor is bad.
The two wire beside the battery I would have to see it and try to determine where it go or supply before I can advise you.
If you are concern that these wires are the power supply for the fan then that can be tested to find out.
I hope this help you.

Mar 14, 2009 | 1992 Toyota Celica

1 Answer

Cooling system

sounds like the thermo fan check that the fan fuse is ok then i cant remember if that model used a relay or not but if it did you will need to check the relay aswell.

Jul 02, 2008 | 1992 Volkswagen Passat

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