Question about 2000 Mercury Cougar

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Radiator fan doesn' run

Radiator fan doesn't run, egine overheats at idle

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If you can apply 12volts directly to the fan connection and it runs, then the fan thermostat is your problem. If a direct connection does not work, then the fan motor has failed and will need to be replaced.

Posted on May 03, 2010

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Overheats after running about ten minutes...doesn't overheat while idling.


Seems like your thermostat is going out, meaning that it is not opening all the way anymore, at idle its not a problem, no hi RPM on the motor, but as you rev up, temp increases, thermostat not opening all the way obstructs coolant flow so the block does not cool off properly.
Another thing to look at is your water pump, is the fan clutch working properly?
Obstructed radiator, it may need a good flush.
The car is over 10 years old, so expect it to start having issues. I'd advise to check your ******, do a maintenance on it. (filter and fluid change)

Aug 19, 2011 | 1998 Lincoln Continental

1 Answer

I replaced the head gasket on my 1987 944 4 cylinder non turbo single cam . The car runs hot if left ilding for more than 10 minutes . If you drive it , it does not over heat . also notice that the second...


the reason that it doesn't overheat when driving is because there is enough air going through the radiator to keep the engine cool, when idling there is no air going through the radiator until the fans are activated ,when this occurs both fans should be working, you have a problem with the one that isn't working,it may be faulty or a loose or disconnected wire could be the problem......hope this helps......cheers.

Aug 10, 2011 | 1987 Porsche 944

1 Answer

2006 kia optima overheating, no apparent leaks, top radiator hose gets hot lower never heats up, fans dont come on


I would be looking at the radiator fans themselves, especially if the fans are open
framed motors. I had the same problem with an intermittent fan on a PT cruiser,
If your A/C doesn't seem to be working right at stop lights then the fans are
most likely not operating correctly since they assist the condensing coil when idling.
Second thing I would suspect is a thermostat which is stuck closed. (This will cause overheat).
Hope this is helpful.

Jul 31, 2011 | 2006 Kia Optima

1 Answer

The isuzu rodeo 1998 overheats while on the high way. while idling its okay. i have flushed the radiator and removed the themostat from the fan so the fan starts as soon as the egine stars


you problem cyliderhead gasket . when high RPM and laud littel hot air from piston goes to coolant . you should open cylinder head replace gasket check cylider head for straght surfase

Jun 22, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

Car is overheating when driving only. changed thermostat, water pump. fans are running. let car idle for 1 hour after changing pump. needle stays on halfway mark from C-H . as soon as we drive it it...


Hello and welcome to FixYa!


If you have overheating problem, it can lead to multiple issues. You may be running on low coolant that's why the vehicle overheats. If that's the case, please add coolant and make sure that it sits on the right level, too much coolant can cause overheating too for coolant will overflow.


The vehicle may have a faulty or worn out radiator blower motor that's why it overheats. If that's the case then you will need a blower motor replacement to resolve the issue.


If the radiator is clogged with dirt and rusts this issue occurs too. The coolant doesn't flow normally on the cooling system if it's clogged. If that's the case, I strongly suggest that you have the radiator flushed to drain out dirt and rusts. If you think that the radiator served you enough then it's better to have it replaced.


Please do check the radiator hoses, If you have worn out hoses it can cause coolant leakage which can result to overheating. A tiny hole is good enough for the vehicle to overheat.


A faulty thermostat sensor can cause the issue too. If you have worn out thermostat, the fan may not trigger that's why the fan won't work when under stressed conditions. A blown radiator blower fuse can cause this issue too so I suggest that you check the radiator blower fuse and replace it when necessary. What causes the radiator blower fan fuse to blow? It's because of a failing radiator blower motor, If that's the case have the radiator blower fan motor replaced.


Hope you find this information helpful enough and thank you for using FixYa! Have a good one!

Mar 19, 2011 | 1998 Dodge Grand Caravan

1 Answer

The engine overheats and I loose coolant however if I idle the engine until it overheats and put cardboard under the engine i do not find alot of liquid underneath


Hello and welcome to FixYa!


If you have overheating problem, it can lead to multiple issues. You may be running on low coolant that's why the vehicle overheats. If that's the case, please add coolant and make sure that it sits on the right level, too much coolant can cause overheating too for coolant will overflow.


The vehicle may have a faulty or worn out radiator blower motor that's why it overheats. If that's the case then you will need a blower motor replacement to resolve the issue.


If the radiator is clogged with dirt and rusts this issue occurs too. The coolant doesn't flow normally on the cooling system if it's clogged. If that's the case, I strongly suggest that you have the radiator flushed to drain out dirt and rusts. If you think that the radiator served you enough then it's better to have it replaced.


Please do check the radiator hoses, If you have worn out hoses it can cause coolant leakage which can result to overheating. A tiny hole is good enough for the vehicle to overheat.


A faulty thermostat sensor can cause the issue too. If you have worn out thermostat, the fan may not trigger that's why the fan won't work when under stressed conditions. A blown radiator blower fuse can cause this issue too so I suggest that you check the radiator blower fuse and replace it when necessary. What causes the radiator blower fan fuse to blow? It's because of a failing radiator blower motor, If that's the case have the radiator blower fan motor replaced.


If the fluid in radiator doesn't circulate then it means that you have a blown head gasket or a faulty water pump. I suggest that you go for the water pump replacement first specially if you think that it's near the end of it's service life. Usually, water pops out the radiator when engine is reved (a sign of faulty water pump and possible blown head gasket).


Hope you find this information helpful enough and thank you for using FixYa! Have a good one!

Aug 28, 2010 | 2001 Pontiac Grand Am SE

2 Answers

Running hotter than normal looks like it started leaking bad under motor now


There is well-established procedure for trouble shouting the over heating.
Does the car overheat in driving mode?
Yes.
Are you losing coolant?
No. Check water pump (including belt) and thermostat.
If yes make a radiator compression test. You might have a bad cylinder head gasket.
The car doesn’t overheat in driving mode, but overheat in idle.
Does the fan runs?
No.
Check the fan assembly for a bad motor, loose fan blades, or bad connector.
Check the codes for a bad temperature sensor.
Check cooling fan relay and fuse.
If this isn’t enough to solve problem, then send the car at dealer for a “check and advice”.

Aug 24, 2010 | 2002 Chevrolet Malibu

1 Answer

My 1997 Sebring overheats while in idle but


does it overheat going down the road if not check to see if radiator fan(s) is running when it heats up at idle car needs fan to run cool at idle but not while going down road

Feb 17, 2010 | 1997 Chrysler Sebring

1 Answer

The car(pontiac firebird 3800 v6)overheats and


Check to make sure the radiator fan is coming on watch it for ten minute as it runs it should come on if it doesn't replace the fan relay or the fan coolant temp senson located on engine block upper area of engine.

Jul 14, 2009 | 1999 Pontiac Firebird

2 Answers

Radiator fan will not turn on and car overheats.


Check rad fan relay & or fuse under hood in fuse/relay box on drivers side fender area. Map is on underside of cover.

Jul 12, 2009 | 1999 Dodge Grand Caravan

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