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d3 heater fan resistor faulty
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dingdongs
 


Member Since: 30 May 2012
Location: St. Lawrence Bay Essex
Posts: 186

England 2011 Discovery 4 3.0 TDV6 GS Auto Zambezi SilverDiscovery 4

Thats the thermal fuse which is there for a safety to protect cars wiring.if you use a thin wire with a couple of crocodile clips and then go plug it back into the plug of your car your blower should work again.doesnt have to be screwed back in to ducting but will prove the thermal fuse is at fault.Your left thumb is on the heat sink the thermal fuse is measuring temperature of air flow through this once running.Maybe time to get a new one ordered as this will be your problem.Have to go to work now as 3 hours minus uk time.will catch up later.
  
Post #16039013rd Feb 2016 9:16 am
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ChrisDisco3HSE
 


Member Since: 01 Feb 2016
Location: Lancashire
Posts: 37

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks for the help
  
Post #16039133rd Feb 2016 9:48 am
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ChrisDisco3HSE
 


Member Since: 01 Feb 2016
Location: Lancashire
Posts: 37

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Ordered new one from Farnell landrover in Nelson. £65 pick it up Friday
  
Post #16040793rd Feb 2016 3:31 pm
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dingdongs
 


Member Since: 30 May 2012
Location: St. Lawrence Bay Essex
Posts: 186

England 2011 Discovery 4 3.0 TDV6 GS Auto Zambezi SilverDiscovery 4

A snip but hopefully will cure your heater problem.Did you try the test with a crocodile clip on the fuse.
  
Post #16040823rd Feb 2016 3:34 pm
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ChrisDisco3HSE
 


Member Since: 01 Feb 2016
Location: Lancashire
Posts: 37

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

No I didn't try the crocodile clips but I managed to get my new unit for £61 after a bit of arguing with the man at the local landrover dealership so I'm pretty chuffed with that fix. Cheers for all the help
  
Post #16061047th Feb 2016 8:51 am
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John Andre Ognheim
 


Member Since: 29 Oct 2013
Location: Bergen
Posts: 110

Norway 2006 Discovery 3 TDV6 HSE Auto Bonatti GreyDiscovery 3


ChrisDisco3HSE wrote:
Sorry just had one of the lads at work test it he has said that the top resistor next to the capacitor is at fault he said he can't get a reading through it



From the marsk on the board, S-D-G
S= Source
D=drain
G=gate

I would think its a mosfet transistor, controlling the Fan speed. Depending on the signal on the Gate it will decrease/ increase the resistance between Drain & Gate ...
Very simplified and generally.

From the picture, it might be possible to get that transistor out, and put in a new one.... ?
  
Post #16062377th Feb 2016 1:55 pm
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Twintorque
 


Member Since: 29 Mar 2012
Location: West coast
Posts: 112

Scotland 2006 Discovery 3 TDV6 Metropolis LE Auto Java BlackDiscovery 3

Yes it's an easy fix have done a few
  
Post #16071478th Feb 2016 11:57 pm
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John Andre Ognheim
 


Member Since: 29 Oct 2013
Location: Bergen
Posts: 110

Norway 2006 Discovery 3 TDV6 HSE Auto Bonatti GreyDiscovery 3

nice, do U know the type number off that Transistor ?
  
Post #16071599th Feb 2016 5:54 am
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dingdongs
 


Member Since: 30 May 2012
Location: St. Lawrence Bay Essex
Posts: 186

England 2011 Discovery 4 3.0 TDV6 GS Auto Zambezi SilverDiscovery 4

Mines all fine once again after replacing the thermal fuse.got 5 off ebay for £2.50 only needed one and all nice and cosy again Very Happy
  
Post #161029014th Feb 2016 8:15 pm
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LandyIRL
 


Member Since: 24 Mar 2016
Location: Galway
Posts: 123

Ireland 2006 Discovery 3 TDV6 Commercial Auto Bonatti GreyDiscovery 3
Heater/Blower itches all dead

Hi guys,
Just finished putting my disco back together and noticed the heater/blower doesnt work. I have no response from eh switches and dials and tried the start-up test as well as the relay and fuse in the engine bay and nothing.

Any ideas ?
  
Post #17437454th Dec 2016 7:19 am
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mark the spark
 


Member Since: 22 Jun 2011
Location: southampton
Posts: 2475

2014 Discovery 4 3.0 TDV6 XXV LE Auto Causeway GreyDiscovery 4

if you read through the above chain ,your most likely suffering from a failed heater resistor control unit

basically comes down to 2 choices:

quick fix ..spend £65 and buy a complete replacment plug in unit

tech fix strip the module down and replace the thermal internal fuse cost £2.50

read the start of the chain to find out how to get the unit out ,its a simple unscrew and unplug but getting to it through the glove box can be a fiddle
 MY05 SE D3 Manual my first LR what a car
MY10 HSE D4 auto
MY14 XXV more buttons than the spaceshuttle 
 
Post #17443475th Dec 2016 9:20 am
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LandyIRL
 


Member Since: 24 Mar 2016
Location: Galway
Posts: 123

Ireland 2006 Discovery 3 TDV6 Commercial Auto Bonatti GreyDiscovery 3

Hey Mark

Thanks for the advice. I swapped the resistor today but still no joy. Im working if its something more simple yet more tedious.... There is no lights on the heater control panel and no response from any dial. The radio button illuminate as does the LCD surround but.... the lcd is not lighting properly, no stations etc - suspicious but unlikely to be connected i imagine
  
Post #17445285th Dec 2016 3:50 pm
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993porky
 


Member Since: 28 Jan 2013
Location: Sunderland
Posts: 82

United Kingdom 2006 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

LandyIRL
Did you get this problem solved?
Just ive got exact same problem no lights or blowers Big Cry
  
Post #185982020th Sep 2017 9:24 pm
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LandyIRL
 


Member Since: 24 Mar 2016
Location: Galway
Posts: 123

Ireland 2006 Discovery 3 TDV6 Commercial Auto Bonatti GreyDiscovery 3

Hi

Not yet as had a more pressing issue such as another complete rebuild of the engine, this time with a new crank !!
Just have it back together except I'm getting a screeching noise from the bell housing that sounds like flex-plate or TC
If anyone has any clues before i remove the box please help !!
  
Post #186104223rd Sep 2017 11:49 pm
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