Question about 1987 Mercedes-Benz Mercedes Benz 400 Class

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Radiator fan no working after engine starting 10 minute fan no working

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There are only 3 things that can make that fan not work. a bad fan motor which u can jump out to test.no power to fan which you can test with a test light.if u have no power its a blown fuse or a bad relay.Or the temp senser is no good which u can also jump out

Posted on Mar 08, 2009

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Radiator fan is supposed to blow anytime the A/C is on. Thats how you check to see if a fan is working, cause its supposed to blow anytime the A/C is on , but not neccesarily anytime the engine is running.

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Also at operating temperature the fan will run as well. In the early morning before you start the car open the hood - fill the radiator while the engine is still cold. start the engine and wait about 10 minutes or so. The fan should come on before the engine over heats. This may take up to 20 minutes and the fan is designed to run after the car is shut off IF - the temperature is hot enough.

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Bailey19@i hav a 1991 h-accord ex. I have two fans. once i turn the engine off. one of the fans starts running until i disconnect the battery cable.


It actually supposed to work like this. It should turn off in a couple of minutes. Give it a try. Wait for like 10 min to see if it will stop.

Mar 16, 2011 | Honda Accord Cars & Trucks

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Hello... I got problem with my honda odyssey. For the past 3 days, if i start the engine, after 5 min the temperature will goes up to HOT and engine indicator light-up. I turn-off the engine and then start...


Your English is very good.

From what you have described, which is a rapid over heating of the radiator coolant fluid and therefore a hot engine condition, it would appear that the thermostat in the engine's cooling system is faulty.

If the thermostat is sticking in the closed or nearly closed position temporarily, there will be no flow or very little coolant flow between the engine and the radiator and the engine will overheat.

You have advised that after the engine is shut off , and radiator coolant fluid has cooled, you re-start the engine and drive the car without the overheating condition occurring again and the radiator coolant temperature is normal. This time there is no overheating because the thermostat is working normally.

You should have the thermostat replaced as soon as possible because allowing the engine to overheat can cause very expensive engine damage.

If you had a continuing overheating condition then I would suspect both the thermostat and the water pump. However as the overheating seems to be only temporary, and clears itself after you have shut down the engine and re-started it 10 minutes later (without further overheating arising) then I think you only have a faulty thermostat.

Please also check that the electric fans which draw air through the radiator are operating. These run on a temperature sensor and will switch on automatically once the radiator coolant fluid reaches a certain temperature and then switch off again when the fluid temperature reduces. You will hear them running once they start up. If these fans are not working the radiator coolant can quickly overheat in various driving and temperature conditions because there will be insufficient air flow through the radiator to cool the fluid. If the temperature sensor is faulty or has died, or if the electric motors running the fans are faulty, the fans will not operate.

I hope this helps.

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I was traveling 5 to 10 miles an hours due to traffic for about 30 minutes. The aircon was on almost at the same time then suddenly, the engine temperature gauge went to red zone, which denote overheating....


When the Ac is put on the radiator fan would be working almost all the time. since you had been idling in the slow traffic there was no enough ventillation for the condenser to maybe shut off the AC and made it work hard. It is important to check if your radiator and cooling sections are alright. If in the first place there was less water inside, if so there would have been build up. Next if the radiator was blocked from the front it would have choked the cooling and resulted in the engine temperature building up. Please check for leaks in your radiator, flush the radiator and fill up with new coolant. check the pressure cap of the radiator for any fault replace.Finally check the engine performance , correct tuning/ timing , fuel supply.After you have identified any of this start the car and put onthe AC and put it on idling, check after 30 minutes for the radiator fan to cut off - the thermostat working fine- to finalise our fault. Hope this helps? Good day

Jul 13, 2010 | 2001 BMW 325

3 Answers

Overheating after 10 minutes


sounds like a whole heap of trouble!!
dont bother buying it as i suspect the head gasket is leaking or the head itself may be cracked or warped ! could even be worse!!
big $$$ if hes cooked the motor!
Cheers Rob

Aug 15, 2009 | 1993 Lexus Es 300

1 Answer

My98 elantra shuts off every 10 minutes and the engine light shows up after I splash the radiator with water starts again and again I get the same issue over and over can you help me?


Is the radiator and reservoir filled properly? Blow compressed air through the radiator fins from the engine side to get rid of bugs and other debris. Is the fan system coming on when things start getting warm? Check the fan for freely spinning when engine is cold. Lastly, the thermostat may be stuck closed causing overheat.

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My jeep is heating up to about 235-240 after about 10 minutes of driving with A/C on. It usally takes about 30 minutes or more to heat up without the A/C on. I have replaced the fan clutch and thermostat...


Sounds like a partially obstructed radiator, either external, leaves between a/c condenser and radiator, or internal...some cores plugged ...radiators are actually too small for engine in the first place, making them what I consider marginal even when new. A good clue to an internal blockage is if the radiator cannot be filled quickly...a really bad one requires coolant to be literally dribbled in when filling, but likely yours isnt that bad yet. Everything else you mentioned seems normal

Jul 17, 2009 | 2000 Jeep Grand Cherokee

2 Answers

Radiator Fan continuously running with engine off, discharging battery


It is not the fault: for long time Renault has that concept, that is to prevent engine oveheating when coolant circulation is suddenly stopped.

Radiator fan can continue to work up to 10 minutes after engine is off. You should worry about it only if it wouldn't stop even after 10 minutes.

Oct 12, 2008 | 2000 Renault 181

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