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Author Topic: The need for a remote fan switch  (Read 265 times)
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JohnFol
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« on: June 22, 2021, 06:09:18 PM »

My car had a switch added to the dashboard to allow the driver to turn on the radiator fan. Seems this is a common thing, rather than a previous owner not fixing things properly.

So here is my question. If the automatically operated thermostatic fan switch works correctly, why is a remote manual switch required?
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Nigel
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« Reply #1 on: June 22, 2021, 06:32:22 PM »

Hi John,

If the rad switch is working well, no back-up is needed.

However, if it's suspect, or if stop/start traffic on hot days is a regular occurrence,
having that dash option could be your get-out-of-jail card.

Nigel

 
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JohnFol
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« Reply #2 on: June 22, 2021, 06:44:48 PM »

This is the UK so regular stops in traffic, but not regular hot days!
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GerardJPC
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« Reply #3 on: June 22, 2021, 07:12:24 PM »

I think that a switch for the fan is a good idea for city traffic in summer.  You can bring the fan on a bit earlier and mitigate the level of heat in the engine bay, which may have knock on effects on the fuelling.
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WestonE
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« Reply #4 on: June 23, 2021, 08:23:42 AM »

I fit one routinely even though I have ECU and Rad sensor switching. I want the option because stuck in traffic somewhere hot with a fully loaded car is no time to not see the fans kick in.

Eric
PS I use rotary switches because they are compact and do not get accidentally knocked on.
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JohnFol
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« Reply #5 on: June 23, 2021, 09:14:01 AM »

Sounds sensible. I might try and find an illuminated rocker switch so I know it's on.

Eric / all, do you also stick a timer on the manual switch so it stays on for a period of time after the ignition goes off?
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