Fanless power supply I am trying to make my printer quieter and the fan in the power supply is pretty loud. I would just replace it with a better fan but it's a 16v fan. I would like to get a new power supply that is fanless. From reading the wiki I am thinking I should have a 30 amp one because I have a heated bed. Let me know if I am wrong about needing 30 amps because there are lots of 20 amp ones. Can anyone point me to a fanless 30 amp power supply. I found one on aliexpress that calls itself rainproof but I would like more options. I have mainly been looking at the switching LED ones so I can still mount it on the frame like the current one. https://reprap.org/forum/read.php?4,541071,541071#msg-541071 Mon, 11 May 2026 16:01:09 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,541071,546044#msg-546044 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,546044#msg-546044
The temperature of the PS case is always much lower than the temperature of the semiconductor junctions that the fan is intended to protect.

If you knew the fan had a bad bearing, then it must have turned on (how else would you know the bearing was bad except to hear it running?), meaning the PS was getting hot enough to trigger it.

You're running on borrowed time. Good luck.]]> the_digital_dentist Reprappers Sat, 15 Aug 2015 14:38:03 -0400 https://reprap.org/forum/read.php?4,541071,546016#msg-546016 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,546016#msg-546016 thetazzbot Reprappers Sat, 15 Aug 2015 12:55:18 -0400 https://reprap.org/forum/read.php?4,541071,546007#msg-546007 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,546007#msg-546007 thetazzbot Reprappers Sat, 15 Aug 2015 12:20:08 -0400 https://reprap.org/forum/read.php?4,541071,545855#msg-545855 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,545855#msg-545855
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epicepee
You could probably get a big, quiet fan, and print a funnel adapter to cool the PSU. Or use a squirrel-cage blower at low speed.

Yeah I was thinking that too but then I would need to run it off the 12V or drop down the 16V somehow. But then I think if I could get a new one for 20 or 30 bucks I would rather just do that but I still haven't really found the right one so I may just end up doing the bigger fan.]]> msaeger Reprappers Fri, 14 Aug 2015 21:09:30 -0400 https://reprap.org/forum/read.php?4,541071,545784#msg-545784 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,545784#msg-545784 epicepee Reprappers Fri, 14 Aug 2015 14:58:15 -0400 https://reprap.org/forum/read.php?4,541071,544403#msg-544403 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,544403#msg-544403
now that's just thinking too far outside the box :)

j/k]]> thetazzbot Reprappers Mon, 10 Aug 2015 21:24:16 -0400 https://reprap.org/forum/read.php?4,541071,543481#msg-543481 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,543481#msg-543481 the_digital_dentist Reprappers Fri, 07 Aug 2015 19:57:04 -0400 https://reprap.org/forum/read.php?4,541071,543478#msg-543478 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,543478#msg-543478
Ive been running the psu with no fan since i bought it and i have never felt it get warm. But i use a bench powersupply now anyway. I dont like exposed terminals. Hows that for "safety"? Ironic isnt it...]]> thetazzbot Reprappers Fri, 07 Aug 2015 19:36:26 -0400 https://reprap.org/forum/read.php?4,541071,543061#msg-543061 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,543061#msg-543061 msaeger Reprappers Thu, 06 Aug 2015 21:39:38 -0400 https://reprap.org/forum/read.php?4,541071,542965#msg-542965 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542965#msg-542965
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the_digital_dentist
The power brick in the photo is designed to be operated without a fan. The power supply that has a fan is designed to be operated with the fan if not all the time, when it heats up under load.
Correct. Dont believe me then take the fan out like I did for a little and you will be very surprised how hot it gets. These PSUs need a fan.]]> Floyd Reprappers Thu, 06 Aug 2015 15:16:24 -0400 https://reprap.org/forum/read.php?4,541071,542911#msg-542911 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542911#msg-542911 the_digital_dentist Reprappers Thu, 06 Aug 2015 13:25:05 -0400 https://reprap.org/forum/read.php?4,541071,542893#msg-542893 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542893#msg-542893
if the above black power supply has no fan, how is it considered unsafe to remove the fan if it is known the unit is not exceeding safe temperatures without it? Probably has some better heat sinks... I'll have to take a look...]]> thetazzbot Reprappers Thu, 06 Aug 2015 12:36:05 -0400 https://reprap.org/forum/read.php?4,541071,542335#msg-542335 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542335#msg-542335
[attachment 59467 Dell_USFF_PS.jpg]]]> madmike8 Reprappers Wed, 05 Aug 2015 09:58:40 -0400 https://reprap.org/forum/read.php?4,541071,542334#msg-542334 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542334#msg-542334
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the_digital_dentist
While you're at it, why not replace those potentially unreliable fuses with wire jumpers?
Im with you its stupid getting rid of safety items. I tried running mine without the fan on for a test (also looking to quiet it down) and mine got quite hot running a few hours.
Im also looking into mounting a quiet 80mm or 92mm fan on the PSU to keep it cool but also quiet it down. Mine sounds like a harrier jet is taking off in the computer room.]]> Floyd Reprappers Wed, 05 Aug 2015 09:51:30 -0400 https://reprap.org/forum/read.php?4,541071,542292#msg-542292 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542292#msg-542292 the_digital_dentist Reprappers Wed, 05 Aug 2015 07:59:24 -0400 https://reprap.org/forum/read.php?4,541071,542284#msg-542284 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,542284#msg-542284
Thats what i did and it never runs hot.]]> thetazzbot Reprappers Wed, 05 Aug 2015 07:34:16 -0400 https://reprap.org/forum/read.php?4,541071,541245#msg-541245 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,541245#msg-541245 msaeger Reprappers Mon, 03 Aug 2015 07:56:33 -0400 https://reprap.org/forum/read.php?4,541071,541120#msg-541120 Re: Fanless power supply https://reprap.org/forum/read.php?4,541071,541120#msg-541120 www.thingiverse.com].]]> dc42 Reprappers Mon, 03 Aug 2015 01:43:43 -0400 https://reprap.org/forum/read.php?4,541071,541071#msg-541071 Fanless power supply https://reprap.org/forum/read.php?4,541071,541071#msg-541071
I would like to get a new power supply that is fanless. From reading the wiki I am thinking I should have a 30 amp one because I have a heated bed. Let me know if I am wrong about needing 30 amps because there are lots of 20 amp ones.

Can anyone point me to a fanless 30 amp power supply. I found one on aliexpress that calls itself rainproof but I would like more options. I have mainly been looking at the switching LED ones so I can still mount it on the frame like the current one.]]> msaeger Reprappers Sun, 02 Aug 2015 20:23:20 -0400