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xcentric



Member Since: 17 Jan 2016
Location: Midlands
Posts: 247
200tdi heating fan
Fan doesn't work - is there a quick guide to diagnosing/replacing it?
Post #577194 11th Nov 2016 9:21pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
1. fuse
2. wiring to heater speed control behind speedo binnacle
3. fan motor seized

places to start


Click image to enlarge

wire for 300tdi but hop folly point you right direction

https://www.defender2.net/gallery/albums/u...heater.png

black wire to red arrow green/yellow to green arrow

green / slate Grey to yellow arrow
Post #577273 12th Nov 2016 11:10am
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2321
United Kingdom 1984 Defender 90 BMW M57 3.0 Diesel HT Auto Pennine Grey
Usually it's the fan seized up. Remove the intake grille on top of the wing, put your hand in and try to rotate the fan. If it is very stiff or solid, spray a good spray of wd40 in and leave it for half an hour then loosen it up by rotating. It may take two or three attempts to get it free again.

If speed 1 has failed but it runs on speed 2, then the fan speed resistor has failed and needs replacement.

If the fan is free but doesnt work then you'll need to get your multimeter out and work back from the fan to the switch to find the cause. Worth noting as well that the switch switches the earth path.
HTH
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey
Post #577323 12th Nov 2016 5:44pm
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