Silent fan

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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486
2.0 16v
Posts: 128
Joined: Thu May 10, 2018 9:49 am

Silent fan

Post by 486 »

Is there a way to make temperature sensor fan (near the lamp) work silently. Now it has irritating noise.
frog
2.0 Turbo
Posts: 378
Joined: Sun Aug 24, 2014 12:18 pm
Location: Netherlands

Re: Silent fan

Post by frog »

I never heard it in my vehicle. Maybe it just needs a thorough cleaning?
Current "fleet":
2003 406 Estate 2.0HDi 110 - 7 seater - just hit 690.000 kms :cheesy:
2001 Citroen Saxo 1.6i 8v 100

Previously owned:
2000 406 Sedan 2.0 HDi 90
2000 406 Coupé 2.0i 16v 138 - Riviera Blue

PP2000 user, can help with faults / diagnostics in the Netherlands.
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Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10710
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: Silent fan

Post by Doggy »

One of mine stopped working - it was jammed with fine debris.
Try blowing it out with a straw or similar
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
486
2.0 16v
Posts: 128
Joined: Thu May 10, 2018 9:49 am

Re: Silent fan

Post by 486 »

Doggy wrote: Wed Oct 12, 2022 10:12 pm Try blowing it out with a straw or similar
I did exactly this and fan started to whirr. Was very silent before. I have 3 spare of the same type (fan+sensor) and all are noisy. Decided to clean the sensor on the working one because of visible dust and this was my mistake. Now all are noisy. Maybe WD40 may help. Any idea which pins are for fan on 4-pin connector? I guess it is 12V.
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