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Engine temperture runs hot after idling or waiting in traffic for an extended period of time perhaps 10 minutes

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Sounds like your cooling fan may not be kicking on. Start the car in the driveway and just let it run with the hood open. When the engine starts to heat too much, the cooling fan should kick on. If it doesn't, it could be a fuse, a relay, a temperature switch, or the fan clutch itself.

Posted on Aug 10, 2008

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High temperture


Have you check the thermostat?
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AC blows warm air whil idle or at first start


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I removed the thermostatic valve from my 1.3 Honda city (2008), Is there any issue on that ?


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1995 LeSabre - Starts and runs fine, but engine cuts off without warning. First time, 5mph in a crowded school commute traffic. Put in park, and started right away. Second time, after turning onto...


If the motor gets hot and cuts off and will not start for a period of time the problem would be the crank sensor. The sudden cut off and starting right back up can be due to dirty battery cable connections. Remove them from battery and clean all three of them with a wire brush and replace both bolts.

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1 Answer

Fan doesn't run while in idle and begins to over heat until I start driving agin then it cools back down to normal. Also the fan runs when engine is off and drains the battery.


The fan is only supposed to come on when there is excess heat .. in normal driving conditions it doesn't start. When you start your car in the morning the fan won't come on because the engine is cold.

With a hot engine - and it depends how hot the engine is - the fan will only kick in to prevent overheating. In heavy slow moving traffic or a traffic jam, the fan will kick in if needed.

The air flow through the radiator is usually sufficient -in normal driving conditions - to cool the engine.

When you park up and the car has a hot engine, the fan will kick in. This is perfectly normal. It is caused by a surge of hot coolant triggering the fan sensor. Perfectly normal.

The fan then should cut out after a while .. maybe 2-3 minutes at the most. If the fan runs continuously that suggests a fault in the temperature sensor switch.

Next time - wait by the car and see how long it takes for the fan to quit after you have parked up. It should stop of its own accord after a couple of minutes.

If the fan cuts off after a short while, and your battery is becoming drained, that's probably a battery or alternator fault.

Remember: when you start the car the fan won't kick in at idle speed because the engine is COLD, and there is no reason for the fan to start up ..
The fan WILL kick in for a couple of minutes after you have parked the vehicle and the engine is hot

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The air conditioner for my 2001 volvo v70 turbo will shut down periodically while running in hot weather or when running while the vehicle is stopped (traffic) for an extended period. Shutting the AC off,...


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Or, the refrigerant pressure on the low side is too low, caused by not enough r134a refrigerant in the system.

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My nissan engine went to hot after idling in traffic abt 30 minutes with air conditioner on. We put in coolant and let idle for about 10 minutes and it was okay. Then we went to a department store and it...


Hi. Are you runing out of water in the radiator or at the reserve? if this happens there might be leak on the radiator or to the hoses. If there is no leak, then this could be the cooling system of the car that is having a problem. Try to check first the water pump.

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