Car overheats while idleing fan not turning on ac not blowing

Maybe your cooling fan is broken. I had the same problem with a honda civic. It would overheat at idle or low speed, but at high speed the air forced through the cooler would keep the temp down. I don't know why it broke, but I just wired the fan to a circuit that came on when the car started. I used a multimeter to check the voltage of various wires in the engine compartment until I found one that was off when the car was off and on when the car was on.

You can try several things. The radiator fan is controlled by a thermal switch and in some cases the A/C maximum air setting. Do you know if the fan is turning on? Some have 2 speeds. The thermostat is a low cost guess.

The engine idle can be affected by overheating. Also turn off the A/C and see if that makes a difference in idle or overheating.

Check to see if the electric cooling fans are working. Some of the fans have 2 speeds and some need to operate on high speed constantly when the air is on. High speed could be a burnout.

There should be a temperature sensor, a fan Relay, and then the electric cooling fans.

For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----

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This details will help.Thanks.

Your car is not getting hot enough for both fans to operate. One fan and your cooling system is doing the trick.

At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.

Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.

If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?

It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.

Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.

Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..

The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.

sounds like a partially plugged radiator. Colder temps will be OK but when weather warms up the problem shows up too...check for leaves etc between the radiator and ac condenser before doing anything else. Stuff on the outside will act the same way as an internal obstruction.

You will need to Change your Thermostat. A bad Thermostat will cause the Overheat Problem as Stated above. Also, Check you Coolant Level, and see if the Water Pump is Pumping Water through the Radiator. Please Rate my Response, I need all the Help that I can Get! Thanks!

verify the engine cooling fan runs at idle without the AC on, it should come on around just past 1/2 scale on the temp guage, do not let it overheat! these engines have aluminum cylinder heads and u can blow the head gasket out, let me know the results

The Temp gauge should read in the middle of the gauge at operating temperature. This is normal. The radiator fan should come on after idling (not driving) for 20 minutes. The fan should also come on when you turn on the AC. Are you experiencing overheat problems?
Please reply if you have overheating issues.