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DISCO4.COM > Maintenance & Mods (D3)

heater fuses
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 773

Sweden 2011 Discovery 4 3.0 TDV6 HSE Auto Marmaris TealDiscovery 4
heater fuses

Have problems with the heater in my D3 TDV6 MY08.
It is just blowing cold air. Occasionally I get a little warm ait. This is regardless of what the dials are set on. Both sides the same.
Took away the pollenfilter and now the fan is blowing fine.
I understand there are a lot of motors for moving flaps in the system.

Is there a fuse for all these motors????

Relay R14 seems to be fine. And as said the fan works with different speed.  
Post #200111716th Nov 2018 12:17 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10363

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

check the heater hoses on the bulkhead.

Are they both hot ?

It may need a flush  
Post #200112116th Nov 2018 12:32 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 773

Sweden 2011 Discovery 4 3.0 TDV6 HSE Auto Marmaris TealDiscovery 4

Think I solved it.

Too little water in the cooling system.

Now the question is why I had to top up. Where did the water disappear.

Also have a groning sound from the engine which I suspect is the water pump.
Have to listen more careful.

Will there be a faultcode and a Warning light if the pump is getting worse?  
Post #200131016th Nov 2018 11:39 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10363

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

No fault code or light.

You should get a low coolant error message from the tank sensor.
These are unreliable and maybe yours is bypassed. Maybe time to spend £25 (eBay) on a new tank so you know your coolant status. At this troublesome time.

At least you will know when it needs topping up  
Post #200134817th Nov 2018 9:54 am
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 773

Sweden 2011 Discovery 4 3.0 TDV6 HSE Auto Marmaris TealDiscovery 4

Yes the tank sensor is out of order since long.
Have bought a new tank but have not replaced.
During 8 years that I have owned the car there have been no loss of water until now.
What can be wrong now? Could it be the plastic Y shaped thing under the throttle unit?
Anyway. When is time to change the water pump? Is there some pictures on the forum on how to do it?  
Post #200138217th Nov 2018 12:52 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10363

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

water pump / cambelt

this shows how to get to the water pump,

https://www.disco3.co.uk/forum/topic53674.html

from picture 10 onwards  
Post #200144817th Nov 2018 6:21 pm
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