2007-07-05 11:08:10 · 9 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
electronic circuit problem!!!!!!!!!1
2007-07-05 11:18:11 · answer #1 · answered by Juliu C 6 · 0⤊ 1⤋
There are two basic reasons for this:
1. Bad engineering.
2. The switch (thermostat) that controls the on-off of the electric fan will stick or freeze in the closed position. And, if the car is poorly engineered, this will allow the car to draw down the battery after the ignition switch is turned off.
No car has a magical "cool down" feature built in so the fan continues to run with the ignition off. Even cars with electric water pumps do not have this magical feature. It is a failure of the components aforementioned and bad engineering and in some cases, wear and tear on the ignition switch so that something stays closed (switch) that should be open when the key is in the off position.
Good Luck!
2007-07-05 11:29:13 · answer #2 · answered by CactiJoe 7 · 0⤊ 1⤋
Catijoe, you are showing your ignorance about automobiles. Confucius says "Better to keep ones mouth shut and let others think you are ignorant, than to open it and remove all doubt". There are many cars designed to run the cooling fan with the ignition switch turned off.
If the fan runs without stopping until it runs the battery down, then the fan relay is bad. If it runs for a while then shuts off, it's normal.
2007-07-05 11:52:04 · answer #3 · answered by Ron B 6 · 0⤊ 0⤋
Modern electric cooling fan motors are set to cool the engine down when you stop. This is rather ingenious, because a car has no way of knowing how long it will be before you start the engine again, and before this system, the resulting condition when you shut the engine down was called the "hot soak" period, because your hood is shut, your fan was off, and the exhaust manifolds, radiator etc. were convecting enormous amounts of BTU's that, were the engine running, the fan would have been blowing out from under the hood.
2007-07-05 11:14:33 · answer #4 · answered by westcoastvoodoo 3 · 0⤊ 0⤋
Which fan? If it's the cooling fan, behind the radiator, then it may be designed to run until the coolant reaches a specific temperature. If it's the heater/ac fan under the dash, it shouldn't run with the key off. Both of these can run with the engine not running, but the ignition switch in the 'on' position.
2007-07-05 11:16:17 · answer #5 · answered by Scott H 7 · 0⤊ 0⤋
If you are refering to the engine fan then it is possibly thermostatically controlled and therefore can run for a few minutes after you switch the engine off - however it shouldn't run any longer than that. I don't get it, however, given the fact that when the engine is turned off it cools down anyway? hmm.
2007-07-05 11:15:21 · answer #6 · answered by Just some guy 6 · 0⤊ 0⤋
There really isnt, even with a short, there should be no power going to the fan. Sounds like someone wired the fan so you have to manually turn it off, did you just purchase the car used?
Edit: Ron B, who are you calling ignorant? At least he gives full answers in details and does not throw stuff out, in the 05 hummer ac question you told him to change his air and fuel filters because his ac didnt work....
2007-07-05 11:14:57 · answer #7 · answered by Jr. Mechanic 4 · 0⤊ 1⤋
a short in the wiring maybe.. but many times the fan will run after the car has been turned off.. well maybe not many times, but i have heard of it.
2007-07-05 11:12:39 · answer #8 · answered by free_indeed2000 4 · 0⤊ 0⤋
the engine is still hot it runs untill it gets cooled to the right temp
2007-07-05 11:12:50 · answer #9 · answered by SLOMO 5 · 0⤊ 0⤋