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Low coolant warning disable?
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4
Low coolant warning disable?

Is it possible to disable the low coolant warning? Mine has started the occasional fault light syndrome usually triggered when I go over a bump or pot hole, I assume the sensor is in the expansion bottle but I don’t see any cables going into it.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #23093371st Oct 2022 8:50 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Sensor is on the bottom
  
Post #23093381st Oct 2022 9:25 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

What will happen if I disconnect it?
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #23093511st Oct 2022 12:07 pm
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motorworks
 


Member Since: 14 Nov 2019
Location: Usk
Posts: 401

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

I think closed circuit - light is off, and open circuit - light is on. I had a RRS in with a wire bridge across the plug terminals to ignore the issue.
 Chris  
Post #23093551st Oct 2022 1:42 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Thanks that is what I was hoping to hear, do you know if can I access it by removing the headlamp?
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #23093591st Oct 2022 2:45 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Why not replace the bottle? Then you will know when your coolant level is actually low, rather than when it is too late, no? Confused
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #23093611st Oct 2022 3:06 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Just a temporary measure while I obtain one, gets a bit embarrassing when giving the outlaws a ride and they keep saying “what’s that red light on for, are we safe?) Twisted Evil it hasn’t lost any coolant in the last five years I don’t see why it should now, famous last words I suppose with the luck I’ve had this year.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #23093651st Oct 2022 3:39 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I replaced my bottle and sensor.

It hasn’t lasted many years!!!

I guess I really should try and swap the sensor just incase it’s that, and not the float
  
Post #23093681st Oct 2022 4:27 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Any recommendations for a good sensor supplier or complete replacement bottle, I have just sent an "eblag special" sensor back as it was a loose fit into the bottle, I don't want to risk losing my coolant again.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #231053711th Oct 2022 9:41 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Well the sensor doesn't need to be water tight.

I guess the answer is an OEM tank.

My ebay one didn't last many years until the warning returned
  
Post #231054711th Oct 2022 11:06 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

So what you are saying is if the sensor falls out of the bottom of expansion bottle no coolant will be lost? Shocked
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #231063311th Oct 2022 8:33 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yeap.
  
Post #231064811th Oct 2022 10:06 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

How does the sensor detect the water is low if it doesn’t come into contact with it?- I have just returned a sensor because it was a loose fitting and I was afraid of loosing the coolant Big Cry
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #231070812th Oct 2022 10:48 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12676

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

only guessing but would it be a magnet in the float ?
  
Post #231070912th Oct 2022 11:02 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Jag, LR, BMW

have a kinda of tube in the bottom of the tank, with the top sealed and bottom open for the reed switch to push into.

inside the tank the float with magnet, going up and down on the tube.

It was a great idea in theory, so there could be no leaks from it.
The downside it that the float can't be replaced, and is the most unreliable part!
  
Post #231071112th Oct 2022 11:28 am
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