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    Fan on PC seems to be running constantly now.......why?

    Hi, recently the fan on my PC seems to be running constantly making the computer really loud. Dont think it used to be like this.

    Any ideas why?

    36 Comments

    Is it free from dust ?

    (check the intakes as well.)

    You need to oil them
    the oil has gone or you need to replace them

    I.T Expert 20 years in the business.

    Banned

    because it's July and the fan speed depends on the temperature of the computer, it's hotter so it is making the fan spin faster. get a fan controller if you want to make it quiet

    you need to stick your member between the blades

    IT expert? telling someone to oil fans in a computer?

    Thank god I dont have to send my computer to someone like you

    fans in pc's do NOT need oiling - ever

    Open the case and use a hairdryer on cold, blow every bit of dust you can see out of the case, especially around/on top of any fans in the computer, and dont forget in the power supply (the bit the mains lead plugs into)

    Handy to have a vacuum cleaner on beside you as it can suck the dust from the air as your blowing it out, it wont collect all but it will get some.

    The case and CPU fans on my pc are always on, should I be worried, thought it was normal?

    Original Poster

    if i open it it is there not a chance i can break it?

    Ive had it 2 and 1/2 years now mind you

    makershaker;8970793

    if i open it it is there not a chance i can break it?Ive had it 2 and … if i open it it is there not a chance i can break it?Ive had it 2 and 1/2 years now mind you



    No you should be fine. Just make sure you have turned it off and earthed yourself before going in. If your not confident doing it you could just take off the side of the case while the hot weather is about to increase the air circulation.:thumbsup:

    Original Poster

    GAVINLEWISHUKD;8970831

    No you should be fine. Just make sure you have turned it off and earthed … No you should be fine. Just make sure you have turned it off and earthed yourself before going in. If your not confident doing it you could just take off the side of the case while the hot weather is about to increase the air circulation.:thumbsup:



    what do you mean 'earthed yourself'? should i put on the rubber gloves i bought the missus for doing the dishes?

    To earth yourself just touch the power supply anywhere on the metal chasie. This will release any static and prevent any damage. Just dont go rubbing your feet on nylon carpets or wearing cheap shell suits

    makershaker;8970871

    what do you mean 'earthed yourself'? should i put on the rubber gloves i … what do you mean 'earthed yourself'? should i put on the rubber gloves i bought the missus for doing the dishes?



    Touch your radiators or the PC case, this should discharge all the static electricity, however these aren't fully fool proof.

    HOTDEALER231;8970725

    You need to oil themthe oil has gone or you need to replace them:DI.T … You need to oil themthe oil has gone or you need to replace them:DI.T Expert 20 years in the business.



    Are you sure?

    20 years and 1 day in the business...

    lol

    Original Poster

    seems to be louder ever since i upgraded the anti virus to AVG Free 9.0

    Hold on here.

    A fan running constantly has nothing to do with dust, if he said the fan is slower or isn't working, sure, but if the fan is now working at 100%, it could be that.

    1) If his CPU fan used to work at CPU temp, now it's working at full speed could indicate his CPU being at a very high temp
    2) Whatever used to monitor fan speeds on is now not working, if he has installed something lately it could of disabled it or is interfering.
    3) Borked fan which needs replacing.

    What fan are we talking about?, I have had PSU fans being broken which get insanely loud, and have had a loose case fan which also got louder.

    It's hot, which is quite unusual for the UK. Be pleased that your fans are dissipating the heat.

    makershaker;8970942

    seems to be louder ever since i upgraded the anti virus to AVG Free 9.0



    CPU Is probably under more load as most antivirus programs make the your computer a lot more busy and always seem to slow the pc down. Anti virus is needed but always seems to have an adverse effect.

    makershaker;8970942

    seems to be louder ever since i upgraded the anti virus to AVG Free 9.0



    Look at the processes in task manager (Ctrl+Alt+Del) to see if anything is using lots of processing power which will course your CPU fan speed to increase.

    Download this.

    almico.com/spe…php

    See if anything seems unusual.

    Wotwot123;8971059

    Download this.http://www.almico.com/speedfan.phpSee if anything seems … Download this.http://www.almico.com/speedfan.phpSee if anything seems unusual.



    Kind of pointless if you don't know what your doing (no offense op). All if will give him is a list of temps and fan speeds.

    dust! took my case side off and cleaned the fans as best as i could with kitchen roll wich was the tinyest bit damp, my hoover and a cotton bud! now dosnt make a sound.

    Wotwot123;8970953

    Hold on here.A fan running constantly has nothing to do with dust



    Not even if said dust is clogging up the air vents? :roll:

    Wotwot123;8970953

    Hold on here.A fan running constantly has nothing to do with dust, if he … Hold on here.A fan running constantly has nothing to do with dust, if he said the fan is slower or isn't working, sure, but if the fan is now working at 100%, it could be that.1) If his CPU fan used to work at CPU temp, now it's working at full speed could indicate his CPU being at a very high temp2) Whatever used to monitor fan speeds on is now not working, if he has installed something lately it could of disabled it or is interfering. 3) Borked fan which needs replacing.What fan are we talking about?, I have had PSU fans being broken which get insanely loud, and have had a loose case fan which also got louder.



    mine was makeing loud wurring noise which was due to dust

    dust and carpet fibre is the first culprit. It accumulates over time and u'll see small pea sized bits that look like tumble weed stuck next to the vents.

    Another long shot is; open your task manager and check speed of ur cpu. It could be constantly running at 100% and the usual culprit for this is firefox! If it is get googling for solving high cpu usage in firefox!

    GAVINLEWISHUKD;8970989

    Look at the processes in task manager (Ctrl+Alt+Del) to see if anything … Look at the processes in task manager (Ctrl+Alt+Del) to see if anything is using lots of processing power which will course your CPU fan speed to increase.



    dcx_badass;8971041

    It is probably just the weather my PC temps are at least 5°c above normal … It is probably just the weather my PC temps are at least 5°c above normal for the last week.



    OP, these are the posts that you should follow up. The post from the IT expert regarding lubricating a fan is actually not as nonsensical as it sounds. The nonsense is from the people that are ridiculing him/her (and the pathetic vultures who like to jump on the ridiculing bandwagon, using the situation as an excuse to kick someone while they are down). Both ball bearing and sleave bearing fans require lubrication. Sleeve bearing fans work by rotating a shaft over a layer of oil. Ball bearing fans work when the fan rotates around concaved grooves of lubricated ball bearings. Both types require lubricant and the lack of lubricant can be a cause of excessive noise.

    Many BIOSes will give you fan temperature readings, albeit with the CPU at a state of idle. However, while the fan is on, you can quickly reboot into the BIOS before the CPU has had chance to cool down significantly and inspect the temperature readings. Inspect the threshold limit by which fan speed is adjusted, within the BIOS. For example, the BIOS may be set to spin the fan at 1500 rpm at 50 degrees C or 2000 rpm at 60 degrees C and so on an so forth. If the fan was set to a 750 rpm speed, for example up until a 50 degrees C threshold then the higher temperatures we have had recently could have pushed the CPU temperatures just above a 50 degrees C threshold, so the fan speed changes from 750 rpm to a relatively noisy 1500 rpm, based on the above configuration.

    If the above is not possible (eg. if your BIOS does not provide CPU temperatures) you can try a utility called Speedfan but you need to be cautious as to how you use it. If you set the fan to be idle at 70 degrees C, for example, that would not do the CPU any good at all. Some BIOSes would provide automatic shutdown at high temperatures (but it may be turned off within the BIOS) and modern CPUs can also switch themselves off at high temperatures but you should still take care when using Speedfan, or ask somebody to check Speedfan's readings for you.

    sancho1983;8970762

    The case and CPU fans on my pc are always on, should I be worried, … The case and CPU fans on my pc are always on, should I be worried, thought it was normal?



    Yes they can be on at all times. Some can be speed controlled by resistance and some can report the fan speed to the BIOS. A fan with a 2 pin connector can do neither and will always be on. A 3 pin or 4 pin connector from a fan allows for fan speed control based on measured temperatures. Depending on certain settings, the fan can be running on low or high speed or even switched off.

    whatsThePoint;8971410

    :whistling:



    What's your take on lubricants, at this juncture?

    you could try using ccleaner to help improve the pc performance which maybe of help

    Wouldn't happen to be a packard Bell?

    Original Poster

    No its an acer

    Original Poster

    73 running processes, CPU usage around 3%, physical memory 56%

    Is that about average?

    Using a fairly powerful PC

    makershaker;8972099

    No its an acer



    Model, I'm guessing it has a direct extraction tube as these things hold dust.

    Wouldn't Vacumn it personally would hand clean it.

    IF its not under warranty.

    makershaker;8972283

    73 running processes, CPU usage around 3%, physical memory 56%Is that … 73 running processes, CPU usage around 3%, physical memory 56%Is that about average?Using a fairly powerful PC



    Key thing is it ins't fully loaded so wouldn't be causing the cpu to increase it's heat requiring more fan movement.

    dcx_badass;8972292

    Don't use a vacuum on it ever. And 73 processes is really excessive.



    73 processes isn't excessive.

    I bet it's the temperature as it's summer.

    Clean it out and make it as ventilated as possible.

    whatsThePoint;8971846

    only 3 reasons for fan running full speed all the time or being noisy1 … only 3 reasons for fan running full speed all the time or being noisy1 like others have said a build up of dust2 a build up of programs putting more and more load on the cpu to the point the fan needs to be constant running at full speed to cool it down (likely to be this given the clue "louder ever since i upgraded the anti virus"3 fan is worn out and need replacingCures1 vacuum the fan2 cut down on the number of programs running in the background/at start up3 watch and listen to fan, if it judders or makes a rumble noise rather than spining noise replaceno need for op to start playing with the bios as it was quiet when they first got it and bios settings don't change by themselfs



    Build up of dust is possible. Vacuum the fan is not the cure though! You should advise with caution. I hope you understand why.

    Regarding watching and listening to the fan - now that is a good point.

    Points 2 and 3 are likely and are the points that many have been making - using the BIOS as an aid to discover if the temperature has reached a certain threshold is a very good idea. It is very conceivable that recent temperatures can push CPU temperatures above a threshold set in the BIOS. In this situation, what else do you suggest? One has to look in the BIOS to check since the thrshold is set inside the BIOS! Do you expect the OP to just have a guess? Yes, BIOS settings do not change unaided but ambient temperatures do! I also suggested if the OP is not completely au courant with using the BIOS, then Speedfan is an alternative. The problem is Speedfan provides measurement in a slightly different manner, usually from Pin 4 of a CPU fan header, whereas the BIOS uses Pin 3.

    Original Poster

    Adam2050;8972285

    Model, I'm guessing it has a direct extraction tube as these things hold … Model, I'm guessing it has a direct extraction tube as these things hold dust.Wouldn't Vacumn it personally would hand clean it. IF its not under warranty.



    Acer aspire M5100, and its not under warranty.

    So how do i clean it?

    makershaker;8972528

    So how do i clean it?



    If it is a case fan, the best thing to do is to take it out and clean it out the case, just a bit of toilet roll on each of the blades.

    DON'T use a hoover or a hair-dryer on your PC. That'll go as well as drying your hair in the bath.
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