# P12 Fan keeps running **URL:** \ **Category:** Power Components\ **Created:** [March 23, 2022, 4:56am UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258 "2022-03-23T04:56:13Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![UUS\_ch](https://avatars.discourse-cdn.com/v4/letter/u/a3d4f5/32.png) [@UUS\_ch](https://forum.psaudio.com/u/UUS_ch)\ **Post date:** [March 23, 2022, 4:56am UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/1 "2022-03-23T04:56:13Z")
I just upgraded from p5 to p12 and everything sounds better, except that the p12 has a fan sound that the p5 doesn’t have, it doesn’t stop like the p5 after it’s turned on, I keep the ventilation on the top and bottom (reserved 5cm on the top, and the bottom is 3.5cm, and p12 is not hot) can I make him stop? Or is he normal? All devices use about 150w ---
**Author:** ![Terrence](https://avatars.discourse-cdn.com/v4/letter/t/cdc98d/32.png) [@Terrence](https://forum.psaudio.com/u/Terrence)\ **Post date:** [March 24, 2022, 8:50pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/2 "2022-03-24T20:50:07Z")
I have an old post on it. > [@Let’s talk about P12 fans](https://forum.psaudio.com/t/let-s-talk-about-p12-fans/11469): > > I have followed some of the P12 topics, and found there were some questions concerning P12 fans “problem” such as “ at 50C, fans not on…” or something like “will fans ever turn on…” Personally speaking, I really like to know how the P12 fans work. Searching PSA web did not find info I need, except on the product design page it says “…The next challenge was adding whisper fans to the bottom of the heat sinks; fans so quiet that…”. I have P12 purchased directly from PSA on April 28, arrive… ---
**Author:** ![jamesh](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jamesh/32/3871_2.png) [@jamesh](https://forum.psaudio.com/u/jamesh)\ **Post date:** [March 24, 2022, 8:55pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/3 "2022-03-24T20:55:19Z")
The fans do come on right when you flip the P12 on. I believe the switch off after about 30 seconds of being on. There’s a thermostat in the P12 which turns it on when it hits a certain temp. Is it possible the unit is always staying warm? Might be worth unplugging everything and check if it turns off then. ---
**Author:** ![UUS\_ch](https://avatars.discourse-cdn.com/v4/letter/u/a3d4f5/32.png) [@UUS\_ch](https://forum.psaudio.com/u/UUS_ch)\ **Post date:** [March 25, 2022, 12:25pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/4 "2022-03-25T12:25:17Z")
Okay, when I turn off the socket, the fan does not rotate, I think it may be caused by my rear stage? ---
**Author:** ![UUS\_ch](https://avatars.discourse-cdn.com/v4/letter/u/a3d4f5/32.png) [@UUS\_ch](https://forum.psaudio.com/u/UUS_ch)\ **Post date:** [March 25, 2022, 12:26pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/5 "2022-03-25T12:26:58Z")
My rear stage is LUXMAN L-509, any suggestions on how to improve it? ---
**Author:** ![Terrence](https://avatars.discourse-cdn.com/v4/letter/t/cdc98d/32.png) [@Terrence](https://forum.psaudio.com/u/Terrence)\ **Post date:** [March 25, 2022, 10:32pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/6 "2022-03-25T22:32:00Z")
Maybe check the Powerplay will get more info. Here are two Powerplay weekly capture from my P12. 1. Around summer time, with my gear on, fan on my P12 is always on ( never stop). 2. This week, fan on my P12 is always off, even with my gear on. ---
**Author:** ![weedeewop](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/weedeewop/32/190064_2.png) [@weedeewop](https://forum.psaudio.com/u/weedeewop)\ **Post date:** [March 25, 2022, 10:36pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/7 "2022-03-25T22:36:36Z")
Just a thought, you may want to check the P12 air flow (inlet and outlet) when the fans are running. Possibly they are not providing the intended heat removal. ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [March 25, 2022, 10:48pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/8 "2022-03-25T22:48:10Z")
How much airspace do you have below and above your P12? You may need a bit more breathing room for air to circulate up through your P12… Best wishes ---
**Author:** ![Terrence](https://avatars.discourse-cdn.com/v4/letter/t/cdc98d/32.png) [@Terrence](https://forum.psaudio.com/u/Terrence)\ **Post date:** [March 26, 2022, 11:44am UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/9 "2022-03-26T11:44:09Z")
In my case, the clearance to the top is 4inch. Front and back are open. During the summer time, when there is load and internal temperature from Powerplay exceed about 42/43F, one fan on, running in slow rpm. Never notice the fan noise through. ---
**Author:** ![RonP](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/ronp/32/213555_2.png) [@RonP](https://forum.psaudio.com/u/RonP)\ **Post date:** [March 26, 2022, 12:43pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/10 "2022-03-26T12:43:01Z")
Can you move the P12 temporarily to a spot where it will have unlimited breathing space above and around it? ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [March 26, 2022, 1:22pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/11 "2022-03-26T13:22:35Z")
Hey Terrence… The above the P12 space is good…how about underneath it…as that is where the cooling air would be drawn up from…that one may need more space… Best wishes ---
**Author:** ![UUS\_ch](https://avatars.discourse-cdn.com/v4/letter/u/a3d4f5/32.png) [@UUS\_ch](https://forum.psaudio.com/u/UUS_ch)\ **Post date:** [March 26, 2022, 2:01pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/12 "2022-03-26T14:01:27Z")
Well, thank you for your replies. But I’ve already sold my P12 that I bought less than half a month ago because of the system adjustment, maybe next time I’ll choose a model above P15 😛 ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [March 26, 2022, 2:16pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/13 "2022-03-26T14:16:22Z")
Hmmm that must mean a P20 is in your sights 😁 Hope you have a strong back…as for me had to prethink my pathway from doorway to my P15’s current location… a lot of slip n slide with a few breaks in between resting my back untill P15 was in place…P20 is much heavier… Well worth the effort!! Do keep us updated … Best wishes in your journey ---
**Author:** ![Terrence](https://avatars.discourse-cdn.com/v4/letter/t/cdc98d/32.png) [@Terrence](https://forum.psaudio.com/u/Terrence)\ **Post date:** [March 26, 2022, 4:57pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/14 "2022-03-26T16:57:09Z")
Hello Davida, My P12, underneath just the typical footings on P12 (0.5 inch) Maybe I should try to lift it up to have more spacing beneath to check if this will help the cooling during the summertime. Thanks for advice. —Terrence ---
**Author:** ![davida](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/davida/32/94292_2.png) [@davida](https://forum.psaudio.com/u/davida)\ **Post date:** [March 26, 2022, 5:24pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/15 "2022-03-26T17:24:05Z")
Hey Terrence… While it would seem that 1/2" below the P12 would be sufficient space for air to be drawn in to P12… Perhaps another 1/4" - 1/2" could make the difference. I had a P12 (it was wonderful!!) mine however had a large space under it and above it maybe 8" or so (can’t rightly recall). Seldom would I hear the fans kick in… Hopefully you will find the solution for your P12… Best wishes ---
**Author:** ![Baldy](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/baldy/32/223847_2.png) [@Baldy](https://forum.psaudio.com/u/Baldy)\ **Post date:** [March 26, 2022, 5:33pm UTC](https://forum.psaudio.com/t/p12-fan-keeps-running/28258/16 "2022-03-26T17:33:15Z")
I wonder if the temp sensor or thermostat has gone out of calibration? Mine is on the bottom shelf of the rack with a BHK preamp sitting on some isolators on top of the P12. Mine runs at about 180 watts output and 45 degrees C. If the fan ever runs I dont hear it or notice.