Fan not running - Acer Aspire AX3910 Desktop

Question edited for clarity, MAKER.
Question moved to Model Category.

Your fridge freezer has three fans.

The compressor evaporator fan cuts in and out as required to maintain temperature.

The fridge evaporator circulation fan runs to maintain an even temperature. It stops when to open the door and resumes when you close it and stops when the set temperature is reached as long as the compressor isn't running. If the compressor is running, the fan normally runs to prevent icing which happens slowly.

The freezer also has a fan, and that runs pretty much all the time unless target temperature is met and the compressor is not running. This fan runs when you open the door to stop the moist air from the room freezing on contact to the 0'F, -18'C evaporator fins. The fan keeps the air moving to deposit less frost.

It sounds like your is running normally except for the noise. Trace the noise and find it. The compressor fan has a Shark Paper fibre board cover and these often distort over time and touch the fan blades. That is the common cause. The less common cause is the internal fans pinging off built up ice that should have been removed during the defrost cycle.

Cooling fan is controlled by a relay and a temp sensor. You need to check that each piece is working.
Run power to the fan. fan run? fan ok.
Bridge the relay. Fan run? run power to the relay coil. Fan run? relay good.
find temp sensor. replace.

Check the afc Automatic fan control is shut off too soon .

need to know brand and model. which fan was replaced ( evap or cond ) . if evap fan it may be the door sw as some model only run fan wth door closed. if it's the cond (fan) motor then ck wiring at compressor . or borken wire. in or about the compresser area .. hope thes help . mm

The fan has to run if the compressor is running as the fan assists in removing the heat from the condenser coil. Can you spin the fan by hand? If there is full power(120 volts) to the fan and it isn't running then the fan motor is bad. Also, if the fan motor has a run capacitor this could keep the fan from running(if the capacitor is defective) so look for this first.

One fan should run when engine is running. Other fan should run when AC is on.

Hi, Check voltage to the fan. The fan will only run when the compressor is running. If you have voltage to the fan whilr the compressor is running, replace the fan.
I hope this helps. If I can assist you further, please let me know.

Thanks
Vic

2006 mini cooper s power steering fan seezed. replaced with new fan won't run?

The tempature switch for the fan will be located on the radiator tank, most likly near the bottom or mid way up. It will have two wires in most cases.

With the key on but the car not running, connect these two wires together. If the fan runs, replace this radiator switch.

If the fan does not run, pull the connectors apart going to the fan itself. Jump power and ground to each of these two wires. If the fan does not run, the problem is the fan. If it does run, the problem is most likely the relay for this fan

Good Luck!

Have you confirmed the fan has a good ground, sounds like you have eliminated the issue of 12 volts, when you turn on the fan then the AC does the compressor run? if the compressor runs pull the plug to the fan motor and check to see if has 12 volts with a test light, wait for moment because the fan may not run until the AC system pressure reaches a certain pressure point, this means that even though the compressor is running the fan may not always run, There is a quick test for the fan circuit, disconnect the fan sensor at the thermostat housing, the fan should come on, this is failure mode, so if the switch goes open the fan will run to keep the engine from overheating , let me know after the tests are run.