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300TDi CSW Phil

Member Since: 03 Apr 2016
Location: Bracknell
Posts: 750

1995 Defender 110 300 Tdi CSW Epsom Green

Heater blower fan woes

Long story short.

Found two problems the motor was seized and the loom in the wing was chaffed through. At this point I was getting 3ohms or thereabouts across the resistor for low speed.

Bought a new fan

a motor a plate and a bit of plastic abused the plastic quite significantly.

Fixed up the loom and wrestled the lot back into place.

Before connecting the final 2 pin plug to the motor I used the voltmeter to see what I was getting at the connector. 0v off, 0v slow, 12.8v full speed

Looks like the resistor has packed up with all the moving about.

As I plan on this being a keeper still do I:

a) live with single max speed fan

b) Bite the bullet and spend a fortune on a new resistor to keep it original (not that the rest of it is, mud console, lots of Carling switches and metal binnacle etc)

or

c)bite the other bullet and buy the Land Reiziger variable speed loom and controller

There is a D option which is to build my own version of the land reiziger (considerably cheaper) but no where near as original looking as speed control would be a rotary knob which I'm not sure where I would put. 1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS

3rd Jul 2023 1:39pm

geobloke

Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

If it were me I would stick with full speed. I hardly ever use the 1/2 speed option.

3rd Jul 2023 1:45pm

excossack

Member Since: 22 Feb 2012
Location: North West
Posts: 5850

1999 Defender 110 Td5 SW Caledonian Blue

Re: Heater blower fan woes

300TDi CSW Phil wrote:
Long story short.

Found two problems the motor was seized and the loom in the wing was chaffed through. At this point I was getting 3ohms or thereabouts across the resistor for low speed.

Bought a new fan a motor a plate and a bit of plastic abused the plastic quite significantly.

Fixed up the loom and wrestled the lot back into place.

Before connecting the final 2 pin plug to the motor I used the voltmeter to see what I was getting at the connector. 0v off, 0v slow, 12.8v full speed

Looks like the resistor has packed up with all the moving about.

As I plan on this being a keeper still do I:

a) live with single max speed fan

b) Bite the bullet and spend a fortune on a new resistor to keep it original (not that the rest of it is, mud console, lots of Carling switches and metal binnacle etc)

or

c)bite the other bullet and buy the Land Reiziger variable speed loom and controller

There is a D option which is to build my own version of the land reiziger (considerably cheaper) but no where near as original looking as speed control would be a rotary knob which I'm not sure where I would put.

Rotary knob to the right of the steering wheel. Might have been a hole for a choke on petrol models? 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock

3rd Jul 2023 1:48pm

Dinnu

Member Since: 24 Dec 2019
Location: Lija
Posts: 3421

2012 Defender 90 Puma 2.2 CSW Santorini Black

You can get a Pulse Width Modulator for less than a Pound. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

3rd Jul 2023 1:54pm

300TDi CSW Phil

Member Since: 03 Apr 2016
Location: Bracknell
Posts: 750

I was looking at PWM kits on ebay for less than £8. They have an on off switch and the variable speed knob, my concern is the quality and longevity of the componentry as well as where to fit the switch and knob.

I could bypass the included switch by switching the negative via the existing controller (assuming that isn't the prolblem) and then it's just the rotary which could indeed go in the nice spare hole on the steering column. 1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS

3rd Jul 2023 2:04pm

LandRoverAnorak

Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

There's probably an option E where you buy a, no doubt much cheaper, non-original resistor and repair it that way. You'd have to determine the resistance of the original but I doubt it needs to be too accurate. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia

3rd Jul 2023 2:38pm

300TDi CSW Phil

Member Since: 03 Apr 2016
Location: Bracknell
Posts: 750

That is also an option.

I believe it is 2.5ohms or 3ohms depending on what you read and where.

What I'm not so sure about is the power rating that it needs.

That said I think there is a guy on Eblag that sells a kit which allows for a "slightly faster" slow setting which wouldn't be a bad option as long as it isn't the switch that is giving me grief. 1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS

3rd Jul 2023 3:08pm

MarkBrown

Member Since: 03 Oct 2022
Location: Mid Wales
Posts: 475

1983 Defender 110 Other HT Auto Keswick Green

I bought one of the kits off eBay. It's a gold resistor, plus the diagram of how to connect it. All fine although I never use half speed anyway.

3rd Jul 2023 3:29pm

donmacn

Member Since: 06 Nov 2017
Location: Nth Scotland
Posts: 1845

Well, I'll just put in a good word for the Landreiziger kit.

I fitted one of these several years ago. I'd have to check to be sure but easily 5 or 6 years, and it's been great.

I don't know what % of the time it spends on full vs somewhere along the range between there and off but it's just a well made and very functional piece of kit.

If you're handy with electronics etc then maybe a DIY alternative makes sense - but if my L'reiziger control failed I'd buy another. Donald

1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong
(The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html )
2000 Range Rover P38 4.0L V8

in the past..
RR classic - fitted with 200Tdi
1984 RR classic - V8 with ZF auto box
1993 Discovery 300Tdi

not to mention the minis and the Type 2 VW camper...

3rd Jul 2023 9:44pm

300TDi CSW Phil

Member Since: 03 Apr 2016
Location: Bracknell
Posts: 750

It would appear that I have a self healing system as slow blow is back this morning. I'm wondering if the boyconfusedbflap open with slow position

1995 300 Tdi Epsom Green - It's a keeper.
Wide Track Sankey- In bits- Gone to a new home
M0XQS

4th Jul 2023 8:07am

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