Question about 1990 Acura Legend

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The cooling fans keep running, on my 90 acura legend, even if the engine is cold and hasnt ran for hours or even days.. They cycle on and off as if the temp. sending unit is saying the engine is hot.. WHY???

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This question got duplicated several times for some reason.
You would check the fan relay to see if the temp sensor is grounding it, if the relay is hanging on, or if you have a short in the wiring.
The blue wire goes from the temp switch to the fan relay and the fan control module.

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: engine cooling fans not working

if relays are good its most likely the engine coolant temp switch

Posted on Mar 24, 2009

  • 909 Answers

SOURCE: cooling fan for acura tl 2000 does not work

If you can locate the temperature switch, looks like a large bolt head with 2 wires on it, bridge the wires on it, and this should make the fan work. If the fan works then this switch is faulty. If the fan doesn't then it could be the fuse, or a broken wire.
The fan switch is either on the radiator or on the thermostat housing.
If you can get to it easy, short across with a screwdriver.

Posted on Apr 27, 2009

  • 3 Answers

SOURCE: my 1994 acura legend keeps overheating

when bleeding the system to get the air out, you may want to turn of the heater to help get all the air out of the system.

Posted on Apr 27, 2009

  • 2187 Answers

SOURCE: 1993 Acura Legend Overheating.

This could happen if your fan is indeed weak.  To test disconnect the thermostat of the radiator by removing the terminals near the radiator hose towards the engine.  You should see the fan run at its highest speed, then you can check if your fan has weakened.

Posted on Jun 07, 2009

  • 52 Answers

SOURCE: 1993 Acura Legend cooling fan relay was replaced

fan should come on at 210 degrees or when a/c is turned on. if it comes on w/a/c and not with temp
replace temperature sensor.

Posted on Nov 22, 2009

Testimonial: "Thank you I will replace the temp sensor and see if thats works."

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Related Questions:

1 Answer

I have a 1991 acura legend the cooling fans are not working properly they come on when the car is cold and after the car warmes up and even gets hot they dont come on


The fans are controlled by a thermostat which receives information from a sending unit which detects coolant temp. Probably one of those, most likely the thermostat. Either or both should be easy and inexpensive to replace

Feb 25, 2013 | 1992 Acura Legend

1 Answer

Cooling fans run after key is turned off, even when engine is cold and sitting for long periods WHY???


could be your cooling fan relar, your engine temperature sensor, or it's meant to be that way. How long has this been going on. Engine may be running hot and takes this long to cool down.

Jan 16, 2013 | 1990 Acura Legend

4 Answers

Why won't the fan motor shut off on my 1991 acura legend?


Hey chandralebea,

Try first by replacing the cooling fan engine temp sensor switch, as this may be the cause.



Good Luck

Jul 29, 2012 | 1991 Acura Legend

1 Answer

Running hot...how doi change thermostat


the normal temp. from 70 to 90 deg cent., if it is in range do not change thermostat.
thermostat range from 92 to 82 so the cooling fan work on 92 and stop on 82 ,check it is written on thermostat.

Mar 23, 2011 | 1993 Acura Legend

1 Answer

How do i bleed coolant system on 1994 acura legend?


USE THE GENERIC METHOD BELOW WORKS FOR ANY CAR.
The generic method of bleeding air from the cooling system is to use a floor jack and raise the front of the car as high as poss, then fill the coolant recovery tank full and run the engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be pulled from the recovery tank, repeat as necessary, never let the recovery tank run dry or more air will be pulled into the cooling systeml

May 19, 2010 | 1994 Acura Legend

4 Answers

My 1994 Acura Legend keeps running hot. Gauge


When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

===

Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

===

Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

===

A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

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Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Nov 18, 2009 | 1994 Acura Legend

2 Answers

91 Legend cooling fan turns on by itself


Replace the cooling fan engine temp sensor switch, this may be the cause.

Nov 19, 2008 | 1991 Acura Legend

1 Answer

Engine cooling fans not working


if relays are good its most likely the engine coolant temp switch

Jun 22, 2008 | 1992 Acura Legend

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