 | Home > Maintenance & Modifications > Heater Blower Switch Replacement |
 
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| chris38 Member Since: 24 Oct 2014 Location: Lancaster Posts: 34  
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And now the stupid question from the Nooby
My heater blower switch is not knackered but takes a lot of fiddling with to change settings. Rather than spend £50 on a new one anyone see any reason why I cant wire up a Carling Off On On to do the same job. Only £10 and it will fill a hole in the dash that I've told the wife that I cant live without. Any suggestions on wire gauge. Be gentle with me Cheers Chris Cheers Chris 300tdi Defender 90 |
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20th Nov 2014 2:14pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610 
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Hi Chris,
I assume it's a 300 TDI? I myself am unacquainted with the setup on a TDI but did find this that may be of assistance. http://forums.lr4x4.com/index.php?showtopic=51594 If you replace with a Carling switch just make sure it has sufficient terminals for your purpose and it is rated at the correct current for your needs. If you go through life with your head in the sand....all people will see is an ar5e!! Treat every day as if it is your last....one day you will be right!! |
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20th Nov 2014 3:39pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6573 
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The switch needs to be Off-On-On as you say.
On a Td5 the wiring to the fan is various sizes between 1.0 and 2.0mm^2! 2.0 for 12V supply to fan, 2.0 for "fast" ground path (to switch, Green/Grey), 1.0 for "slow" ground path (to switch, Green/Yellow), 1.5mm on ground to switch (Black). 1.5mm^2 would be fine, but use 2.0mm^2 if you wish   1988 90 Td5 NAS soft top
2015 D90 XS SW |
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20th Nov 2014 3:53pm |
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| chris38 Member Since: 24 Oct 2014 Location: Lancaster Posts: 34
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Thanks guys,
yep its a 300tdi K9F I love your avatar by the way. Cheers Chris 300tdi Defender 90 |
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20th Nov 2014 5:09pm |
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| VeeTee Member Since: 06 Mar 2011 Location: Somewhere Posts: 1512 
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Another option is to replace the switch (and resistor) with a PWM Module, then you've got a stepless controller for the fan speed. Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold) 1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold) 1975 Series III 88 V6, Light Green (sadly sold) 1996 Defender 110 CSW 300 Tdi, Epsom Green (sold) 2000 Freelander 1 TD4 3-drs, Silver (sold) 2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold) MySite |
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20th Nov 2014 5:50pm |
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| chris38 Member Since: 24 Oct 2014 Location: Lancaster Posts: 34
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Thanks for that,
Looks like a good option but I cant see the variable speed being much use. I either want it ticking over or on full chat. Cheers Chris 300tdi Defender 90 |
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20th Nov 2014 6:03pm |
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| VeeTee Member Since: 06 Mar 2011 Location: Somewhere Posts: 1512
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^ That module is rated 5 A without coolling, and 10 A when mounted on a cooling surface.
I have one (only recently) but I know of others who have one installed years ago - so it works and really is a nice mod!  Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold) 1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold) 1975 Series III 88 V6, Light Green (sadly sold) 1996 Defender 110 CSW 300 Tdi, Epsom Green (sold) 2000 Freelander 1 TD4 3-drs, Silver (sold) 2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold) MySite |
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21st Nov 2014 7:58am |
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