 | Home > Td5 > Heater blower modification? |
 
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| Gareth Member Since: 12 Dec 2011 Location: Bramhall Posts: 1038   
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Has anyone heard or thought about modifying the blower motor controls on a Def TD5? (or Tdi as I presume they are the same)
As standard, it has 3 settings, Off On a little bit Full on hair dryer mode! I wonder if it would be feasible to fit a more modern speed control with more than just the two switch positions. Perhaps incorporating a multi position rotary switch in place of the never used headlamp level knob? I have no idea how the motor is controlled, but I presume in a modern car it is achieved by switching a circuit with more or less resistance? Am I making sense or talking ballcocks? 2021 Defender 110 X-Dynamic HSE D300 MHEV 1966 S2a 109 aka Betsy 1968 S2a 88 aka Bob 2014 Jaaaag F Type 3.0 Supercharged. |
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2nd Jan 2013 4:46pm |
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| Laurie Member Since: 22 Feb 2008 Location: Sussex, England Posts: 2897 
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I've never seen a talking ballcock.....
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2nd Jan 2013 5:02pm |
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| Laurie Member Since: 22 Feb 2008 Location: Sussex, England Posts: 2897
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Don't use a variable resistor on the dash. It will get hot enough to melt plastic.
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2nd Jan 2013 5:08pm |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2547 
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I meant something like this:
http://www.ebay.co.uk/itm/200762259776 Though not that specific one, as I doubt 10A is sufficient for the blower motor. A PWM controller will give you full control of the fan from zero to full whack, with no loss of torque (not that that's particularly relevant in this application). |
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2nd Jan 2013 5:17pm |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6036  
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The likes of the older Rover cars (25's etc), used a multi position switch, rather like that of the headlight levelling switch on defenders (although I'm not certain if the innards are the same,as in, current carrying capacity) and this switched the earth back through several large wire wound resistors behind the dash (well, from the factory they were poxy coils of wire, but most seem to have been changed to WW resistors after the old wire snaps off)
So you could mount something like that behind the dash, not toughing anything else so they don't melt. Here's a before & after wirewound vs. old coily things: Click image to enlarge This would give a 4 speed control (off, resistor 1, resistor2, resistor 3 then full on hairdrier mode) Can't imagine it would be hard to knock something up to fit a defender dash, especially a td5 withough headlight levelling, as you'd have somewhere to mount the switch. You would still need the mechanical cable on the heater control to open & shut the flap. Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated  |
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2nd Jan 2013 5:23pm |
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| VeeTee Member Since: 06 Mar 2011 Location: Somewhere Posts: 1512 
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I am busy with this project. Bought this PWM module: Click image to enlarge If properly installed (w cooling), it's 10A rating is more than sufficient, it has proven it self already in a number of Defenders of fellow drivers here in the Netherlands. 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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2nd Jan 2013 7:10pm |
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| skrettis Member Since: 21 Nov 2012 Location: Norway Posts: 1 
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Have you got more information about this fan control project?
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5th Dec 2013 5:44am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4395
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This is a good idea if you want to be able to have a larger selection of intermediate fan speeds between off and full. This modification will, however, not increase the speed of the fan as you only have 12v to play with and that should already be being achieved with the standard Defender switch. I seem to remember increasing the voltage to the Defender fan being discussed on this forums previously, but cannot recall the outcome.
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5th Dec 2013 9:34am |
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| Peter Td4 Member Since: 23 Oct 2010 Location: Antwerp, Belgium Posts: 227  
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Hi Skrettis,
Here's a Google translated link of a Dutch website that explains more about this mod: http://translate.google.be/translate?sl=nl...mp;act=url There's a lot of other interesting stuff on this site too  Peter,
Defender 110 StaWa - Td5 Defender 110 HCPU - Puma Defender 90 Soft Top - Td5 |
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5th Dec 2013 4:23pm |
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| Mean Green Member Since: 15 Sep 2011 Location: South Ayrshire Posts: 278
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Is there an idiots guide anywhere on how to do this mod. I think my heater is fine on full blast, but a bit more control would be nice. I am just too busy to try to work it out. But if someone had a, get A + B and do X,Y,Z and its done type guide then I would probably do it.
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5th Dec 2013 6:28pm |
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| Romadog Member Since: 07 Jul 2011 Location: Powys Posts: 1746 |
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5th Dec 2013 6:38pm |
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| Anderzander Member Since: 08 Feb 2011 Location: Lancashire Posts: 999
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I've thought of opening the blower up to change the resistor value and make the lower speed a little faster - however a variable resistor would be good.
Any thoughts on where to mount the control ? |
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5th Dec 2013 6:54pm |
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| Anderzander Member Since: 08 Feb 2011 Location: Lancashire Posts: 999
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I've just looked at the Dutch link - that looks a great solution !
I'm looking on a small phone screen but I like the fact that it seems to look like a factory fit. |
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5th Dec 2013 7:44pm |
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| Gareth Member Since: 12 Dec 2011 Location: Bramhall Posts: 1038
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Yes, like that. This seems to be a solution to my original idea. I think I will order one and give it a go. 2021 Defender 110 X-Dynamic HSE D300 MHEV
1966 S2a 109 aka Betsy 1968 S2a 88 aka Bob 2014 Jaaaag F Type 3.0 Supercharged. |
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5th Dec 2013 9:53pm |
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