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Disco 4 MY15/16 HVAC lack of Heating issue.
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Does your MY15/16 have
MY15 Yes
22%
 22%  [22]
MY15 No
9%
 9%  [9]
MY16 Yes
55%
 55%  [55]
MY16 No
13%
 13%  [13]
Total Votes: 99

NC500
 


Member Since: 18 Sep 2017
Location: On the NC500
Posts: 495

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4

So my MY14 LR4.5 is in at the dealers in a couple of weeks time for them to have a look at this problem. They are going to:


1. Recalibrate the flap mechanisms (stepper motors) in the HVAC system via the onboard OBD.
2. Remove the dash front panel to gain access to the cabin temperature sensor located behind the grille to the left of the steering wheel. They believe the tube connecting the grille to the sensor may be kinked and if it is they will shorten and re-rout it.
3. Check vehicle records to see if the tech bulletin LTB00963 has been initiated on my vehicle. If it hasn’t, they will complete it.

In anticipation of this work I connected up my IID Tool and checked the live values of the HVAC system and was surprised at the results of the windshield interior air temp (205 degrees c) and the windshield interior surface temp (148 degrees c)!!!!

Has anyone else with this heating problem had the windshield sensors checked? What should the live values range be - any ideas?
  
Post #18970643rd Jan 2018 5:19 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: Beds/Bucks Border
Posts: 1877

United Kingdom 2005 Discovery 3 4.4 V8 HSE Auto Tonga GreenDiscovery 3

Little bump. Finally had enough of hot feet and cold top. My mid vents also never blow out heat when on Auto.

Going to book into the dealer and refer them to the Bulletin.

Car is a 66 plate Graphite for what its worth. Thumbs Up

Any other tips welcome
 MY2023 Discovery 5 R-Dynamic 3.0
MY2020 Discovery 5 Landmark 3.0 - SOLD
MY2005 Discovery 3 V8 4.4 HSE - SOLD
MY2019 Discovery 5 SE 3.0 - LR Replaced !
MY2005 Discovery 3 S 2.7 - SOLD
MY2016 Discovery 4 Graphite - SOLD
MY2015 Discovery 4 SE Tech - SOLD 
 
Post #190609524th Jan 2018 8:20 pm
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philm
 


Member Since: 02 Oct 2016
Location: Manchester
Posts: 732

England 

Mines just been back in, all tests done, said that is how all the d4's work, even LR relations were in contact with me and the dealers, nothing from them either.
Keep us informed if they work it out.
 L633 Defender
Range Rover Velar-gone
Discovery 4 Landmark-gone
Gap IID Tool 
 
Post #190610224th Jan 2018 8:28 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: Beds/Bucks Border
Posts: 1877

United Kingdom 2005 Discovery 3 4.4 V8 HSE Auto Tonga GreenDiscovery 3

Shall do. Not holding out to much hope Confused
 MY2023 Discovery 5 R-Dynamic 3.0
MY2020 Discovery 5 Landmark 3.0 - SOLD
MY2005 Discovery 3 V8 4.4 HSE - SOLD
MY2019 Discovery 5 SE 3.0 - LR Replaced !
MY2005 Discovery 3 S 2.7 - SOLD
MY2016 Discovery 4 Graphite - SOLD
MY2015 Discovery 4 SE Tech - SOLD 
 
Post #190610524th Jan 2018 8:31 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

It sounds like one of these things that LR will hopefully just kick into the long grass until the JLR warranties are finished and they can say it's not our problem any more. Like the surround cams Censored quality.

Is it so fCensoredn difficult to provide a heating system that works, its not rocket science. I'll have the chance to buy a 66 plate Landmark at family rates in a couple of years but won't touch it if this hasn't been resolved. If that happens I'll be jumping ship.

Beware if LRCS use the phrase "works to design intent", it means " fCensoredk off and stop annoying us, we're not going to fix your car so the heating will actually work". Rolling Eyes
   
Post #190610724th Jan 2018 8:36 pm
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philm
 


Member Since: 02 Oct 2016
Location: Manchester
Posts: 732

England 

It looks like they would have to write a new program to fix the issue and are not interested now no longer made.
Only hope that GAP get hold of it and can sort it for us.
 L633 Defender
Range Rover Velar-gone
Discovery 4 Landmark-gone
Gap IID Tool 
 
Post #190610824th Jan 2018 8:40 pm
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NC500
 


Member Since: 18 Sep 2017
Location: On the NC500
Posts: 495

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4

So, mine was in the dealers last week and they checked everything as recommended:

Recalibrated the flap mechanisms (stepper motors) in the HVAC system via the onboard OBD.

Removed the dash front panel to gain access to the cabin temperature sensor located behind the grille to the left of the steering wheel. Straightened the tube connecting the grille to the sensor thus removing the kink.

Carried out tech bulletin LTB00963

And the results were.......


Still freezing cold air out the dash vents PLUS a stiff volume control on the stereo and a knackered vent control on the dash vent. So next week it’s going back in to the dealers so they can fix the problems that weren’t even there before they got their hands on it!! They can’t do anything else about the heating!

What crap- can’t quite believe LR are so dismissive of this fault, shan’t buy another.
  
Post #190611024th Jan 2018 8:41 pm
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tde
 


Member Since: 04 Jan 2010
Location: Durham
Posts: 40

England 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Having read through this thread as I am having the exact same issues, but mine is MY12? Is there a separate know issue for MY12's? Or I am just lucky in that I have a MY15/16 'feature' on my MY12? Laughing
  
Post #190615524th Jan 2018 10:08 pm
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tonymcg
 


Member Since: 15 Mar 2016
Location: basingstoke
Posts: 49

2016 Discovery 4 3.0 TDV6 HSE Lux Auto Santorini BlackDiscovery 4

Hi folks

the cold is back and so is the fun of trying to keep warm in the D4

There was some talk about it being the temperature sensor at fault and a dealer fix of insulation around the sensor, my dealer did the insulation around the sensor two years ago and it made no difference

just wondered if anyone got a fix apart from using "manual" setting to set fan speed and air distribution?

Cheers

Tony
 D4 HSE Luxury 2016
D3 HSE 2009
D2 ES Premium 2003 
 
Post #20909679th Oct 2019 3:30 pm
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Surfrider
 


Member Since: 20 Sep 2019
Location: Buckinghamshire
Posts: 63

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Just keep standing by... JLR are hot on the case hiring someone to sort this out!

https://www.jaguarlandrovercareers.com/job...550849601/



*On a serious note* I will have to test out my MY16 D4 for this issue. I haven't noticed anything as of yet. I will pay more attention in the coming colder months.
 2016 D4 HSE Lux  
Post #20910849th Oct 2019 9:16 pm
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MrH
 


Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754

United Kingdom 

Yup got mine fixed - replacement parts needed...



Mercedes E-class Estate
 LRs are a fond memory, apart from the maintenance.  
Post #209111010th Oct 2019 6:10 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72740

Ukraine 

And a very nice E Class it is too. Thumbs Up
   
Post #209111410th Oct 2019 6:28 am
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1505

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I’ve notice that when I’m in manual mode the faster I go the cooler the cabin temp gets.
I think that may also happen in auto, but going to check next time.
It’s almost like wind chill is affecting the temp. You’d think it would compensate and do more to keep the temp stable.
 Gary
-------------------------------------------

Discovery 4 HSE 2016MY 
 
Post #209168812th Oct 2019 11:05 am
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Armpit
 


Member Since: 08 Mar 2017
Location: Manchester
Posts: 53

England 2016 Discovery 4 3.0 SDV6 Graphite LE Auto ArubaDiscovery 4

Well guys, not being able to bear another winter and with my warranty running out in September, I have chopped mine in and got a Q7..........cabin temperature is perfect !

It's a real shame because i loved the Discovery otherwise.......JLR should be ashamed, the whole experience had me resenting a car that I had aspired to own for a long time.

I will never own a JLR vehicle again and on a positive note, I don't have to worry about the crankshaft failures !!

Good luck with sorting your issues..........



Cheers - Paul
  
Post #209179512th Oct 2019 6:42 pm
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BorisBarKeep
 


Member Since: 13 Dec 2012
Location: Northants
Posts: 93

United Kingdom 2016 Discovery 4 3.0 TDV6 Graphite LE Auto Stornoway GreyDiscovery 4

Picked our 16-plate Graphite up a month ago. Have only used it a few times and on first long journey both me and OH thought that the car seemed cool - at the time put it down to fact we were both soaking wet after packing up caravan and awning.

With the recent cold weather though, we've had to have the temp up at 26 or higher to get any warmth at all. On our old 2010 it was fine at 22 and soon needed turning down to 19.

Our VIN is in the range affected by the sensor/foam issue. However on long run this morning even manual setting of temp (no AC, no Auto) didn't get it really warm.

Have contacted dealer to see what they have to say
  
Post #209899211th Nov 2019 2:06 pm
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