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Re: fan not running
It depends on make of laptop. my toshiba's fan "NEVER" came on, yet it is going on 14 years old and works perfectly. I have another toshiba where the fan cycles on and off on its own. to be sure you are not overheating it, purchase one of those cooling trays (or prop it up on a hard surface for maximum exposure to ambient air) just for peace of mind.
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fans came late on those car,like 212 and second fan comes on at 224,you reprogram it to come a lot sooner,,other thing is there might be gunk inside the block,and coolant has hard time to pass through,and staying longer than enough in block temp goes high,even tough the radiator is doing it's job,it is just coming out block lot hotter than it suppose to be,and gauge read the block not the radiator
Sounds like it's overheating, if it comes on for a few seconds or even minutes. Turn it upside down, and clean up the cooling fan with a nice dry paintbrush. You may need to remove a back cover to get to the fan though.
The check engine light is supposed to come on when you turn the key to the on position. That proves to you that the light is not burned out. The check engine light then goes out within 5 seconds after the car starts. That is normal. Also the heat and air all come on when you turn the key to the on position. I don't think there is a problem there at all.
If there is no fans spinning or nothing, check the adapter to see if it has malfunctioned.
It is possible that the transformer that converts the voltage from what the adapter puts out, to what the laptop uses, doesn't work at all. This piece is supposed to regulate the proper voltage to the laptop.
You have all the simpthoms of an overheating laptop.
For starters, get a vacuum and **** all the dirt from the fan or fans on the back/ bottom of your laptop.
Then turn on your laptop. It should stay longer than 5 seconds.
If this solves your problem, then you are lucky.
If not, you'll need to have your laptop serviced, and clean the heat sink, and have reapplied the heat transfer compund on the processor.
Not a big deal, and not that expensive either.
If this answer helps, please don't forget to rate.
The defrost timer will turn off the compressor and its cooling fan. At the same time it turns on the defrost heater, and usually leaves the freezer fan running. Defrost can take half an hour, easy. As soon as the defrost thermostat is satisfied, the defrost heater is supposed to turn off, and the compressor may come back on. The defrost timer is about the size of a cell phone, with about five wires going to it in a plug. It has a small dial on it that only goes one way. You can mark it and wait a half hour to see if it moves.
Yes, Massive air flow from the first fan is causing air to be brought in from not only the front of the radiator but from the fan right next to it causing reverse air flow through the fan. This intern can cause less dirrect airflow through the radiator. Also, the recirculation of hot air (from the first fan) into the second fan, across the radiator and back to the first fan can cause the vehicle to run hotter. Wile the car is moving there is enough air pressure from the outside of the vehicle to flow directly through the radiator with little fan assistance needed. If you have the engine running and and turn on the a/c, you should hear the fan change speed or even see the second one turn on (If the fan is working), there is no delay. You might have a bad relay and good fan, as there is a separate relay that activates this same fan for the a/c.