Fan not running.

no......unless it still calls for it...

Which fan is that? The heater fan or the engine cooling fan?

I have the same problem on my Kia Optima. Really wanna know what happen...

Guys, as Kelly & Regrets said, it depends on what fan you are talking about. If the cooling fan in the engine compartment, that should never come on when you start a car until the engine coolant temperature comes above a predetermined temp, usually between 190 and 210 degrees. Then it comes on just long enough to drop the temp down and turns off. If you mean the fan inside the passenger area, then there is a wiring problem in the controls someplace like the switch or a resistor. The heater/A/C fan should always run regardless of the temperature as long as you turn the switch on.

i have similar problem i disconnect the engine temp sensor and the fan comes on. in every other instance the fans do NOT activate. all the relays and switches must be good since the fans do activate when i unplug ets right? ...l;;;;

Huston, did you read the last post above yours? If so and you still have a problem, then explain exactly what your problem is. Cooloing fans (the ones under the hood in front of the radiator) do NOT come on and stay running all the time since the early 70's when they changed them from belt driven to clucth driven, which then only turned on when the engine temperature reached a predetermined temperature. When the temp was reached, the fan turned on and ran until the temperature dropped and then shut off. In newer cars or most cars since the 90's, everything is electric driven with relays and motors, no more bearings, belts or clutches. When your temp gets too high the electric motor starts spinning your fan until the temperature drops, then it shuts off completely. The cycle of the fan going on and off happens continuously while the engine is running. If you strt your engine and stand there long enough staring at it, eventually you will both hear and see it running and as soon as the temp drops it turns off. Some cars also have multiple speed fans that are controlled by relays hased on temp sensors/coolant sensors. If you car is not overheating when you loet it idle or drive it, you do NOT haver a problem. If it does overheat you need to just leave it running long enough (until the guage hits red, or a "temp" light comes on and see if it is running. If not you have a bad sensor, or bad thermostat or bad water pump or even a blown head gasket. If you are talking about the fan inside the passenger compartment not running for heat or A/C, then you have a bad switch or thermistor in the dash controls.

2013 hyundai sentafe fan not working

finish engine overalking then start heat coming fan not working why???

engine cooling fan