Advertise on DISCO3.CO.UK
Forum · Gallery · Wiki · Shop · Sponsors
DISCO3.CO.UK > Maintenance & Mods (D4)

Heater issue
Post Reply  Down to end
Page 1 of 1
sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 885

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4
Heater issue

Hi peeps. I’ve read a few threads about heaters blowing cold on one side and wonder if I have a blocked matrix or a motor flap issue. The passenger side blows warm and the drivers hot.

Is it worth trying the back flush method first? Should I use a cleaning agent? Also, what coolant do I need to top up with? Is it oat that has to come from land rover?

Many thanks in advance. Steve.
 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #204924928th Apr 2019 10:01 am
View user's profile Send private message View poster's gallery Reply with quote
sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 885

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

No body done this? Can any one tell me which is feed and which is return please?

Thanks. Steve
 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #20501541st May 2019 8:53 pm
View user's profile Send private message View poster's gallery Reply with quote
sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 885

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

I had a chance to check today, but not to flush.

When I set both heater controls to low, the blend motors show maximum cold, but when on hot only show intermediate.

Is this right? I would assume it should show maximum hot or something of the like and intermediate anywhere in-between. With the air con on the passenger side blows cold when on hot, luke warm when ac is off. Driver side seems ok but not as hot as id like.

Im assuming that both blend motors are not fully actuating, passenger worse than driver.

Is there a self test calibration function like on the d3.

Any help greatly appreciated. Cheers.

Steve
 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #205236611th May 2019 3:58 pm
View user's profile Send private message View poster's gallery Reply with quote
sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 885

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

This is what the live data shows.





Can some one please confirm which hose is the inlet and which is the outlet, and if indeed these are the hoses??? They will be a right Censored to get to.



 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #205237011th May 2019 4:23 pm
View user's profile Send private message View poster's gallery Reply with quote
Oswiperus
D3 Decade 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

I'm pretty sure the inlet is the drivers side of the 2 hoses but should be able to feel them warm up to prove it.

Not had the problem yet but it appears always to be cool on passenger side when matrix is silting up on both D3 & D4 from reading post over the years.


Certainly worth a go at back flushing but people have managed to change the matrix ok I believe.
 Stu

2016 D4 Landmark current
2022 Defender D300 SE Gone Sad
D4 2014 XS Commercial - Gone Sad
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone Sad
D2 1999 TD5 E white - current 
 
Post #205243911th May 2019 8:49 pm
View user's profile Send private message View poster's gallery Reply with quote
sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 885

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

Just an update, I flushed the heater matrix both ways, with cold then hot water. I used a rad cleaning solution and flushed several times with fresh water and compressed air. Got quite a bit of crap out.

Works much better now.

Steve
 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #206253520th Jun 2019 6:33 am
View user's profile Send private message View poster's gallery Reply with quote
Oswiperus
D3 Decade 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

Result! Thumbs Up
 Stu

2016 D4 Landmark current
2022 Defender D300 SE Gone Sad
D4 2014 XS Commercial - Gone Sad
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone Sad
D2 1999 TD5 E white - current 
 
Post #206253720th Jun 2019 6:58 am
View user's profile Send private message View poster's gallery Reply with quote
ncant1987@gmail.com
 


Member Since: 13 Dec 2022
Location: Norfolk
Posts: 3

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

sasdiscos wrote:
Just an update, I flushed the heater matrix both ways, with cold then hot water. I used a rad cleaning solution and flushed several times with fresh water and compressed air. Got quite a bit of crap out.

Works much better now.

Steve


^^ Hi Steve,

Appreciate this thread is pretty old now, but just looking to see how you did the flush on the heater matrix! Can't find any decent youtubes on it anywhere!

Cheers,

Nathan
  
Post #231853213th Dec 2022 7:22 pm
View user's profile Send private message View poster's gallery Reply with quote
TheBrownHornet
 


Member Since: 18 Mar 2013
Location: Perth
Posts: 4

Australia 2009 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Hi Nathan,

No intention of stepping on the OP's toes.

I recently flushed mine with remarkable success.

I used a commercial product by Airboy called a Jet Flusher that used a mix of water and compressed air. Have seen home made solutions on this forum that appear to have worked equally well.

https://www.jwl.dk/en/jwl-jet-flusher/

https://disco3.co.uk/forum/coolant-flush-h...eater+cold

Hope that's of some help.

Regards

Graham
  
Post #231857714th Dec 2022 6:52 am
View user's profile Send private message View poster's gallery Post Reply
Display posts from the last:  
Post Reply Back to top
Page 1 of 1
Jump to:  
Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums

DISCO3.CO.UK is independent and not affiliated to Land Rover.
Switch to Mobile Site