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Re: The radiator fan runs after ignition is turned off.
Relay is burnt and arced across on the contacts ,renew relay where is it ???honestly dont know should imagine its on top of the fuse box but it could be under the bonnet as its a heavy discharge so it will have a big 40amp fuse somewhere and the relay will be close by
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Does the fan motor shut off after a time or does it run your battery down?
If it runs for a time and shuts off, this is normal with a lot of cars today. It is a second stage cooling system that keeps cooling even after the motor is turned off. They all have either a temperature control or timer switch that turn them off.
If the motor runs till your battery is discharged then the temperature or timer control switch has gone bad and needs to be replaced.
Should you find that your car is overheating while in town, then the fan motor or sensor switch are usually what is at fault and will need to be evaluated and replaced accordingly.
In some vehicles, the radiator cooling fan is controlled independently by a thermostatic switch. What you perceive as a problem actually is normal operation. When the temperature reaches a certain point, the fan turns on. When you stop and turn off the ignition, the fan continues to run until the temperature decreases to a point where the fan turns off
the temperature cooling sensor, The sensor's output is monitored by the engine computer to regulate various ignition, fuel and emission control functions, and to turn the radiator-cooling fan on and off as needed. check this first ! also check the fan relay in relay box. it may be sticking in the on position. hard to say without being there. but try the above things. good-day ! the fans come on if a/c is on.
the radiator fans use a fuse,relay,temperature sensor which the computer controls to turn on the fans at the specified temperature.you don`t say if this problem occurred when the blower motor fan fuse was removed.it is not uncommon for the rad cooling fans to seize and not work,the blower motor uses an electronic resistor block on the air box under the hood with i think about 6 wires in the plug and is about 3.5"long and 1"wide.held by 2 bolts(screws).this is feed power all the time and when the control switch is turned for different fan speeds the switch grounds the circuit.at times the resistor shorts causing the fan to run continually.i think you need a new resistor to fix this problem.
Many cars have this feature. The fan will run for a few minutes at a time until the coolant in the radiator drops below a certain temperature. Most vehicles with this feature will have a warning label on the radiator shroud indicating that the fan may start without warning when the engine or radiator is still hot. The only time you would need to be concerned would be if the fan continues to run without turning itself off, and causing the battery to be drained.
lead acid (auto) type batteries cannot be left in a discharged state very long without damage ...if they have been discharged awhile then they will recharge but at greatly refuced capacity ... sometimes they can be recovered but usually its perminant damage .. even if the batteries can be saved it would still take several hours to recharge ...so leaving it on a charger overnight will show you if its a lost cause or not ...you can have the batteries "load tested" usuallly at auto parts stores for free .....they should be fully charged first to save time ...lead acid batteries should always be kept in a state of full charge ...never store them in a discharged condition or allow them to selff discharge (a discharged battery will freeze over the winter) ... charging once a month should keep them healthy .. more often in a car since the computer draws current all the time .. if you have a regulated charger then you can leave it connected all the time for storage ...high resistance battery connectios will have the same effect .. so remove and clean the battery terminals to eliminagte that possibility ... you can have your alternator tested at most auto parts stores ..usually free .. if you have maintainable batteries then check the water level . dont over fill .. use distilled water ...if your charging systems are ok then it sounds like you need new batteries ...
I just started experiencing the same problem. Yes, typically after rainy days, I can never get the interior lights to go out after the ignition key has been removed. The car acts as if there is a door open. Now, my latest problem is with the heater fan. Of course, putting the control in the "off" position will turn it off but you can turn it on and off with no ignition key installed. I'm also having problems with my heater core too so it's been a pain in the but!!
I believe this problem has also caused my battery to die which is why I'm on this site in the first place!! I can't get into the car with the keys and the dead battery won't allow me to unlock the car!! When it rains it pours!!!