Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

335 Perguntas Ver todas

CPU Fan is running full speed with normal temperatures

Hey All-

I just replaced my hard drive with a 3tb and added a ssd behind the optical bay using the kit and cable from OWC. Everything seemed to go fine and i've been able to re-install the OS.

However, now i've noticed the CPU fan only is running full blast, but the temperature sensors seem low. I've been able to slow it down using Macs Fan Control, but am very curious why this is happening. I could keep using this program, but i'd rather let the OS handle. I have reset smc and pram.

All temperatures are in the mid-30's (C)

Anyone have thoughts here?

Respondido! View the answer Também tenho esse problema

Esta é uma boa pergunta?

Pontuação 0

Comentários:

I did a hardware test and found that I am getting 4SNS/1/C00000008: TS2p--124.

From what I've read, this is a skin sensor, causing the CPU to increase. I double checked all my connections and it looks good. I did notice the right ambient sensor cable is a little frayed near the edge, but seems to be connected OK.

Anyone have any other info about this error?

por

Adicionar um comentário
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12

4 Soluções

Solução escolhida

The iMac logic board is pretty picky about the thermal sensors it recognises and will go into general fan panic if in doubt.

Do all your upgrade items have compatible sensors and are they all connected properly? OWC are pretty up to speed on this and may have guidance.

Esta resposta foi útil?

Pontuação 1

Comentários:

Adding the SSD didn't require any additional sensors and I did use the sensor cable for the replacement hard drive.

por

After this, i took the computer back apart and put the old hard drive in. Still had same problem.

It looked like one of the top temp sensors was touching the case so i got some space around it. Put it all back together with my new drives.

Presto! no more cpu fan going nuts!!!!

por

Adicionar um comentário
Resposta Mais Útil

Sounds like the OWC sensor is not doing its job. I would contact OWC to see if they send you a new one.

Esta resposta foi útil?

Pontuação 4

Comentários:

If that sensor was not working, wouldn't I be seeing my hard drive fan spin like crazy, not the cpu?

por

Have you tried running TG Pro? It will allow you to see the sensors more effectively.

por

Hi Dan-

I downloaded this and all my sensors look good..i can see my thermal sensors now, but TG Pro isn't reporting any hard drive sensors. HOwever, Macs Fan Control is showing both my hard drives...

Does this make sense?

por

Yes, by default SMART is off which is why the HD's aren't being read. Unless I'm working on a possible HD thermal issue I leave it off as SMART requires an IRQ call which slows your system.

por

Adicionar um comentário

Have you changed the thermal paste?

Esta resposta foi útil?

Pontuação 0

Comentários:

I didn't change the thermal paste as I didn't remove the cpu

por

Adicionar um comentário

Have you run activity monitor and find out whats using your CPU more?

Esta resposta foi útil?

Pontuação 0

Comentários:

I don't have significant cpu usage, and all my temperature readings seem to be within normal range.I think Iain is on the right track, just need to keep digging.

por

Adicionar um comentário

Adicionar a sua resposta

Chad Predmore será eternamente grato(a).
Visualizar Estatísticas:

Últimas 24 horas: 0

Últimos 7 dias: 5

Últimos 30 dias: 22

Todo: 987