My fan is getting power because the lights work, but the fan won't turn at all... No hum... nothing... could the fan switch be bad? Could I replace that? I am fairly handy with soldering and electricty....
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The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.
PSU's put out several different voltages if the 12Vs isn't working it won't power the motherboard. Some outputs may still be functioning therefore you may see some lights on and even some fans running. Replace the PSU.
The humming would be the fuel pump coming on. It should only hum for a few seconds, then shut off.
Your problem is with the start circuit from the battery to the starter, or from the ignition switch to the starter solenoid. Check the connections at the starter (the big cable) for tightness. Is the battery charged up enough to turn the engine over? Check by turning headlights on and observe while someone turns key to crank. If they dim a LOT, then either battery is too low, or the starter is bad and needs removing for testing. If brightness doesn't change, then the circuit from ignition switch to starter solenoid is likely not working. Check for 12 volts at the small wire to starter solenoid with key in cranking position. If you have power there, the solenoid may be bad. Remove starter for testing. If no power at solenoid in starting position, then either the ignition switch is bad or the neutral safety switch might be the problem, or the wiring from the switch to the starter solenoid is not passing current. Good luck.
If you plug it in and turn it on, does it "humm".
If so, it is getting power. It could be the blades are stuck on something: do they turn by hand?
The motor could be dirty also, is the blade hard to turn?
It can be repaired by Vornado, or you can dis-assemble the motor and clean it.
Believe it or not, it's due to a weak power supply. More specifically, weak voltage rail/s caused by failing Electrolytic Capacitors.
A bad computer power supply is about 70% of computer failure.
ALL the light use less than 1 Watt. EACH fan uses 2 to 3 Watts.
A processor uses 55 to 125 Watts. Depends on the make and model.
Since the power supply is weak, it doesn't have enough power to turn the processor on. No processor, nothing to find the Boot record on the harddrive. Nothing to get the Operating System going. (Example: Windows XP)
No computer running, there is no signal to the monitor. Just enough power to light lights, and spin fans.
There is less than 120v getting to the fan. Its possible that the lights will turn on etc. Take an extension cord and plug it in another plug and grab both power wires from the fan and stick them in other end of extension and I do service calls for broan & Nutone
Jean-Marc try it out. Im sure your not getting 120v completelty.