After reading your answer i found that my fan wasn't even working, unless i had the heater on. i asked a dealer and he said it could be the water pump, but my over flow box has boiling hot water in it. so i was thinking if the pump wasn't working then the water in the over flow box should be cold right. dose the water pump control the fan. i thought there was i temp thing that turned the fan on depending on the temp of the car. the dealer want 200 to look at it.
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Re: over heating bug guy
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if the pump is not working or the thermostat is stuck closed, the water will not circulate, engine would be very hot but the radiator and/or the coolant reservoir would be comparatively cold;
the water pump is mechanically driven by the belt and has no electrical connection therefore it could not switch anything on or off;
in your vehicle, the fan is controlled by two switches; a thermal switch on the radiator and either the heater or the A/C switch. Either must be engaged for the fan to work on reaching a certain temperature.
in my country being in Asia, we normally remove completely the thermostat (not applicable in cold weather) and hard wire the fan to be always on when the engine is running.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
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when a fuse keeps blowing it can only be one of two causes. either the consumer is loading the circuit too much due to a bearing problem or rusty component, or there could be a short circuit to ground. disconnect the blower motor plug connector and turn your a/c on like normal. if it blows the fuse again, replace the blower fan motor. if not, start checking the wiring for any exposed copper that might touch the ground-negative.also inspect all the plug connectors for water damage and corrosion.
If fan still runs when all your heater control knobs and buttons are off, it is likely a bad heater fan switch. Unless you have something like a body control module found on newer cars that has some control over interior functions. If not, try a new heater fan switch. Good luck.
If the car is under warranty (3 years/36,000 miles I think) have the dealer check it. You might have a blown fuse, and most owners manuals show the location and amperage of the fuses for the various systems. Generally speaking, a fuse should not blow unless something is overloading that circuit, so you might have something like water ingress shorting wiring or a heater fan motor drawing too many amps...start with the fuse.
there are different things that can cause this.make sure the coolant level is full in the rad and overflow bottle.make sure the cooling fan is working properly,check for a bad water pump(noisy or leaking),replace the thermostat as it could be sticking closed,you could have a bad head gasket that can be checked with a block check that checks for combustion chamber gasses in the coolant.i`ve even seen a heater core plugging up that has caused an over heat because it wasn`t allowing coolant to flow through out the ssystem acting like a plug.these are known for the cooling fans at the radiator siezing and not working check that first then if its been a while change the thermostat,then go from there with the above suggestions.
Hi,i had similar problem,the fan wasn't working.When i turned heater on hot it released the heat from the engine & temperature went back down.Turned out my fan relay fuse had blown.$5 fixed the problem.Hope this helps.
you have to trust someone,or go to school and get your mechanic papers,then you can diagnose your own problem and others as well.You read your forums and you went to the dealer so what else is there? At some point you have to believe somebody even if they end up wrong.We all have to travel this path of the unknown it's not nice but it's what we do.Step up to the plat and make your own decsion trust yourself or accept the help you ask for.No one is perfect not even you.
the only problem that vehicle has is with cooling fans is relay/module or electrical harness to module that burns up located behind and under right front headlamp assy must remove headlamp to access relay/module that is what powers up fan motor module assy.