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#1
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Tip: blowing out fans
Hi All,
Tip: If your fans are noisy, blowing them out won't help things. It is time to replace them. If your fan is clogged, DO NOT USE a shop air gun to blow it out! Use a can of compressed air that states it is for electronic equipment and capture the fan blades so they do not rotate when you hit them with air. Shop air guns have oils and other stuff yo do not want all over your circuit boards and their air flows can cause static electricity build ups. Fans, when ran backwards with external air, become generators and send current back down their wires, which can damage your motherboards. And certainly damage any PWM circuitry on the fan. So do not let the blades spin when blowing them out. Yes, it is fun to watch them whirl -- don't do it anyway. -T |
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#2
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Tip: blowing out fans
T wrote:
Tip: If your fans are noisy, blowing them out won't help things. It is time to replace them. Not wholly correct. If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime. This isn't dust floating and settling due to gravity. It's dust slamming into fan blades, and dust is not clean. It will stick. Even a new fan will vibrate if it is unbalanced. After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust. Then blow out again. Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer. They sell compressed air cans for that. |
#3
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Tip: blowing out fans
On 2019-11-11 4:41 p.m., VanguardLH wrote:
T wrote: Tip: If your fans are noisy, blowing them out won't help things. It is time to replace them. Not wholly correct. If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime. This isn't dust floating and settling due to gravity. It's dust slamming into fan blades, and dust is not clean. It will stick. Even a new fan will vibrate if it is unbalanced. After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust. Then blow out again. Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer. They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene |
#4
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Tip: blowing out fans
On 2019-11-11 5:15 p.m., Rene Lamontagne wrote:
On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene I forgot to add, as Edwin Felty noted Use an Oilless compressor Rene |
#5
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Tip: blowing out fans
On 11/11/19 2:41 PM, VanguardLH wrote:
T wrote: Tip: If your fans are noisy, blowing them out won't help things. It is time to replace them. Not wholly correct. If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime. This isn't dust floating and settling due to gravity. It's dust slamming into fan blades, and dust is not clean. It will stick. Even a new fan will vibrate if it is unbalanced. After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust. Then blow out again. Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer. They sell compressed air cans for that. Never seen a dusty fan make noise. I will take your word that you have seen them. It has always been failing bearings causing the noise. Add on video cards are the worst culprit for crappy fans. Intel's boxed CUPS fans are the best. I use PWM fans on all my custom builds. Keeps the fan noise down, but still moved enough air to keep the temperature down. Oh, I take that back. On PWM and other temp controlled fans, as the blades lose efficiency, the fans go faster to try to make up and cause an annoying fan whirring noise. What my customers complain about is bearing rumble. And I have to be really afraid when they say "it went away all on its own". I remote in and check their temperature with Fan Speed I work for several machine shops and auto repair facilities, as well as classic car hobbyists. If the fan starts making noise, out comes the 100,000,000 PSI air compressor! Oh Boy! Make sure you capture the fan blades when blowing on them. And if you don't get a bobble when a fan stops after spinning it with your finger, replace it. |
#6
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Tip: blowing out fans
On 11/11/19 3:15 PM, Rene Lamontagne wrote:
1: Turn down pressure regulator to about 20 PSI Make user the air is clean and not full of oil. it does not take much to mess up. I had a customer spray his computer with WD 40 years ago. Oh Boy! 4:Â*doÂ*thisÂ*Outside,Â*notÂ*inÂ*theÂ*houseÂ*orÂ*s hop When I blow out a computer at a customer site, I always take them outside. It tell the customer that is how they can tell I am a married man. Cracks the ladies up. The guys give me that pained look. |
#7
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Tip: blowing out fans
On 11/11/19 3:18 PM, Rene Lamontagne wrote:
On 2019-11-11 5:15 p.m., Rene Lamontagne wrote: On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene I forgot to add, as Edwin Felty noted Use an Oilless compressor What? No WD 40 ????? I case anyone is taking notes, DO NOT USE WD40 !!! That was SARCASM!!!! |
#8
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Tip: blowing out fans
On 11/11/19 3:15 PM, Rene Lamontagne wrote:
On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene Okay, I can't resist asking. Do you play with the blow gun afterwards: spray off the bench, the floor, the cat, the wife? Spraying the wife can be dangerous. The cat will just condescend about the quality of the hired help. :-) |
#9
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Tip: blowing out fans
On 2019-11-11 7:00 p.m., T wrote:
On 11/11/19 3:15 PM, Rene Lamontagne wrote: On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene Okay, I can't resist asking.Â* Do you play with the blow gun afterwards: spray off the bench, the floor, the cat, the wife?Â* Spraying the wife can be dangerous.Â* The cat will just condescend about the quality of the hired help. :-) NO, NO, NO, Never ever play with a blow gun!!!!!!!!!! Blowing air from a nozzle can penetrate the skin and cause an air embolism bubble in your veins which will go to your heart and kill you as surely as a gun, I have known it to happen to a mechanic here in Winnipeg some years back. Rene |
#10
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Tip: blowing out fans
On Mon, 11 Nov 2019 19:20:28 -0600, Rene Lamontagne
wrote: NO, NO, NO, Never ever play with a blow gun!!!!!!!!!! Blowing air from a nozzle can penetrate the skin and cause an air embolism bubble in your veins which will go to your heart and kill you I believe you meant to say lungs, versus heart. It sounds like you're describing a pulmonary embolism. as surely as a gun, I have known it to happen to a mechanic here in Winnipeg some years back. Agreed, PE's are risky business. |
#11
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Tip: blowing out fans
On 11/11/19 5:20 PM, Rene Lamontagne wrote:
On 2019-11-11 7:00 p.m., T wrote: On 11/11/19 3:15 PM, Rene Lamontagne wrote: On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene Okay, I can't resist asking.Â* Do you play with the blow gun afterwards: spray off the bench, the floor, the cat, the wife?Â* Spraying the wife can be dangerous.Â* The cat will just condescend about the quality of the hired help. :-) NO, NO, NO, Never ever play with a blow gun!!!!!!!!!! Blowing air from a nozzle can penetrate the skin and cause an air embolism bubble in your veins which will go to your heart and kill you as surely as a gun, I have known it to happen to a mechanic here in Winnipeg some years back. Rene Yikes!!!! How about the cat? |
#12
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Tip: blowing out fans
T wrote:
Hi All, Tip: If your fans are noisy, blowing them out won't help things. It is time to replace them. If your fan is clogged, DO NOT USE a shop air gun to blow it out! Use a can of compressed air that states it is for electronic equipment and capture the fan blades so they do not rotate when you hit them with air. Shop air guns have oils and other stuff yo do not want all over your circuit boards and their air flows can cause static electricity build ups. Fans, when ran backwards with external air, become generators and send current back down their wires, which can damage your motherboards. And certainly damage any PWM circuitry on the fan. So do not let the blades spin when blowing them out. Yes, it is fun to watch them whirl -- don't do it anyway. -T I have always used my air compressor on my home computers. Pinpoint nozzle, 30 psi. I am adverse to the store bought commercial compressed gaseous chemicals for the masses stuff. It's not air, it's di/tri/tetra/penta fluoro butane ethane HFC-1xx, etc. And I really don't like the denatonium benzoate or denatonium saccharide. That stuff stays on the electronics, keyboard, hands, etc. Gets into everything, eyes, nose, mouth, etc. C6H5 with a CH2Nx added. If you must use canned duster for portability at a customer's location then get the industrial HFC-134a variety without bitterant and not the HFC-152 version. |
#13
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Tip: blowing out fans
On 2019-11-11 7:36 p.m., Char Jackson wrote:
On Mon, 11 Nov 2019 19:20:28 -0600, Rene Lamontagne wrote: NO, NO, NO, Never ever play with a blow gun!!!!!!!!!! Blowing air from a nozzle can penetrate the skin and cause an air embolism bubble in your veins which will go to your heart and kill you I believe you meant to say lungs, versus heart. It sounds like you're describing a pulmonary embolism. as surely as a gun, I have known it to happen to a mechanic here in Winnipeg some years back. Agreed, PE's are risky business. I'm not sure, I thought it went to the right heart then the lungs but I may be wrong and you are probably right. Anyway the person who died was fooling around with another chap and they were playing with air hoses and one got a close up blast of air in his upper arm which killed him. So this is just a friendly message about how dangerous this can be. Rene Rene |
#14
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Tip: blowing out fans
On 2019-11-11 7:59 p.m., T wrote:
On 11/11/19 5:20 PM, Rene Lamontagne wrote: On 2019-11-11 7:00 p.m., T wrote: On 11/11/19 3:15 PM, Rene Lamontagne wrote: On 2019-11-11 4:41 p.m., VanguardLH wrote: T wrote: Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. Not wholly correct.Â* If the fans are dusty, especially due to the caked on dust due to impact, and because the air is not filtered, the fan can get out of balance with dust and grime.Â* This isn't dust floating and settling due to gravity.Â* It's dust slamming into fan blades, and dust is not clean.Â* It will stick. Even a new fan will vibrate if it is unbalanced.Â* After blowing out with blades/hub fixed, use an ear swab to scrub the blades on front and back to dislodge the caked on dust.Â* Then blow out again.Â* Blow, scrub, blow again. I don't remember hearing of anyone using an air compressor to dust out a computer.Â* They sell compressed air cans for that. I have with precautions. 1: Turn down pressure regulator to about 20 PSI 2: Hold the blow gun at a fair good distance from the computer 3: lock down all fans from turning 4: do this Outside, not in the house or shop 5: Use common sense and good judgement Rene Okay, I can't resist asking.Â* Do you play with the blow gun afterwards: spray off the bench, the floor, the cat, the wife?Â* Spraying the wife can be dangerous.Â* The cat will just condescend about the quality of the hired help. :-) NO, NO, NO, Never ever play with a blow gun!!!!!!!!!! Blowing air from a nozzle can penetrate the skin and cause an air embolism bubble in your veins which will go to your heart and kill you as surely as a gun, I have known it to happen to a mechanic here in Winnipeg some years back. Rene Yikes!!!! How about the cat? I know you were joking so no problems. Just a reminder about air nozzles. I dunno about the cat never had one since 1952, I'm a dog lover, Particularly Golden Retrievers. :-) Rene |
#15
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Tip: blowing out fans
Paul in Houston TX wrote:
T wrote: Hi All, Tip: If your fans are noisy, blowing them out won't help things.Â* It is time to replace them. If your fan is clogged, DO NOT USE a shop air gun to blow it out!Â* Use a can of compressed air that states it is for electronic equipment and capture the fan blades so they do not rotate when you hit them with air.Â* Shop air guns have oils and other stuff yo do not want all over your circuit boards and their air flows can cause static electricityÂ* build ups. Fans, when ran backwards with external air, become generators andÂ* send current back down their wires, which can damage your motherboards.Â* And certainly damage any PWM circuitry on the fan.Â* So do not let the blades spin when blowing them out.Â* Yes, it is fun to watch them whirl -- don't do it anyway. -T I have always used my air compressor on my home computers. Pinpoint nozzle, 30 psi. I am adverse to the store bought commercial compressed gaseous chemicals for the masses stuff. It's not air, it's di/tri/tetra/penta fluoro butane ethane HFC-1xx, etc. And I really don't like the denatonium benzoate or denatonium saccharide. That stuff stays on the electronics, keyboard, hands, etc. Gets into everything, eyes, nose, mouth, etc. C6H5 with a CH2Nx added. If you must use canned duster for portability at a customer's location then get the industrial HFC-134a variety without bitterant and not the HFC-152 version. Electric leaf blower... -- Take care, Jonathan ------------------- LITTLE WORKS STUDIO http://www.LittleWorksStudio.com |
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