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90 / Defender heater upgrade


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I have just read it superficially. Eliminating all leaks goes without saying. My idea was to use a ‘step-up converter’ to have a slightly higher voltage at the fan and to make it stronger. I never realised it.

My experience with el motors is, they tolerate higher voltages very good if you don´t exceed revs to much. They will get destroyed machanically then.

When I remember right, the fan is supplied with 12V. Current is going thru the fan, when the switch contacts directly or over a resistor to ground in the dash.

So there is only 1 cable to supply the fan and it shoult be easy to push it with a step up converter up to lets say 15V.

Ie:

https://de.aliexpress.com/item/1005006501964045.html?spm=a2g0o.productlist.main.11.36817e85anLY3G&algo_pvid=c20e56fe-4443-412c-8647-6e040014ab0c&algo_exp_id=c20e56fe-4443-412c-8647-6e040014ab0c-5&pdp_npi=4%40dis!EUR!11.89!2.05!!!92.06!15.93!%40211b65de17242465775294513e23b4!12000037436805982!sea!DE!0!ABX&curPageLogUid=GeQYWsYHbVGm&utparam-url=scene%3Asearch|query_from%3A

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5 hours ago, Mo Murphy said:

For those who want to use the correct plug for their new blower and don't have one, the part number is 1J0972752 (1J0 972 752).

You can get them from the usual places like Ebay.

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Info courtesy of Paul Mac

Mo

Part number says it's a VAG connector housing and by the look of it, it'll use TE standard power timer terminals.

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1 hour ago, foggy3061 said:

Part number says it's a VAG connector housing and by the look of it, it'll use TE standard power timer terminals.

No, it's not for connecting vag, it's for the electrical connection ... 🤐

Mo

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1 hour ago, Mo Murphy said:

No, it's not for connecting vag, it's for the electrical connection ... 🤐

Mo

Definitely used on VAG vehicles. Used on many things from VW transporters to Audi TTs! 👍

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Well, fits a treat folks. The fit was designed to be snug and it is as intended. Printed with 100% infill, in PETG and it's pretty solid.

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No self taper in this hole yet but thats my intention. Just to help prevent it unlatching!

Edited by foggy3061
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On 8/12/2024 at 6:59 PM, Jon White said:

I’ve just been through all of this. The RDX fan is just a freelander 2 fan. Nothing more special than that (Nige and I saw it on sale at a show last year and took a note of the part numbers off the back). (Also used in an Evoque and various Volvos including a V60).

Anyway - less than a tenner from the breakers and a bit of fabrication its fitted.

I can report it makes a MASSIVE difference over the rubbish defender fan, and also forced me to remove the metal intake scoop i had over the wing top inlet as it can pull way more air in than that scoop can flow.

Slow speed is now faster than the defender was on full pelt, and on full pelt it makes a massive difference. Airflow is now much more balanced and equal side to side.

I do also have an Eberspacher (equivalent) so heat was never a problem for me, however sufficient airflow for demisting was.

Hope this helps someone.

Jon

All thanks go to @Jon White for the idea! I just produced another option that folks could use.

On 8/30/2024 at 7:44 AM, Hazza said:

Looks fantastic @foggy3061, great work. If you're happy to make some then please consider me interested!

Unfortunately I'm not in a position to be able to run them off for others but I am more than happy to share the STL file (print file) or model file for others to use.

Sadly the forum won't allow me to attach the file, but anyone who would like the file (STL or model), just send me a PM with your email address. 👍

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