Member Since: 16 Sep 2007
Location: UK
Posts: 6019
D4 Heating Issue POLL
Given there have been a few posts about heating issues on later Discovery 4's, I am curious how many people on the forum have experienced issues.
The main issues seem to be that the climate control only seems to warm your feet and that you also have to turn up the temperature after a while when it is cold outside to maintain heat.
16th Feb 2017 7:24 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72775
Done on behalf of my folks. Absolutely nuts that LR can't get something as basic as heating sorted. TSB has helped but still not right.
16th Feb 2017 7:39 pm
Red Merle
Member Since: 30 Aug 2014
Location: Liskeard
Posts: 7438
Yes, I've had issues, but what is "TSB"?
16th Feb 2017 7:40 pm
markate
Member Since: 17 Sep 2011
Location: England
Posts: 702
Mine was rubbish but after having the TSB's applied twice it now works fine.
TSB - Technical Service Bulletin there are two relating to the problem, one to fix the external air temperature sensor and the other to fix the HVAC fault.
16th Feb 2017 7:44 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72775
Any TSB numbers/pdfs? Got one, not sure got second.
16th Feb 2017 7:46 pm
Dexter
Member Since: 21 Sep 2007
Location: Aberdeenshire
Posts: 1391
Mine was fine from new, July 2016 reg.
16th Feb 2017 7:53 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23337
I collected my MY16 Landmark late July 16. Without looking it up I'm going to guess it was built mid 2016. I can't tell any difference in the heating system from the previous D4's. The external temp gauge corresponds with the readings from other two cars we own that have this feature.
So is this a typical LR pot luck random problem? Or does it only affect vehicles within a certain date range?2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography
16th Feb 2017 8:05 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50934
Thought this only applied to 2016MY's 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
16th Feb 2017 8:33 pm
countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
I wasn't sure if MY15 affected, maybe we should stick to My16 only
Can't seem to alter it, sorryy
16th Feb 2017 8:41 pm
discoteca
Member Since: 08 Mar 2010
Location: Warwickshire
Posts: 1477
Just a thought, when did the sensor attached to the screen behind the rear view mirror make an appearance? Does it roughly correlate to a significant spike in those who have heating issues? The sensor is described as a humidity and windscreen temperature sensor.
I've definitely noticed that it is tied into the heated front screen function (on my MY10 the front screen always turned off after exactly the same amount of time, on the MY16 it varies massively, presumably depending on the temperature of the screen, presumably as an energy saving function to turn it off once the screen is clear).
Anyway, the only purpose I can see of a humidity sensor would be to direct cooler air to the screen presumably to stop it misting up? If the arrival of the sensor correlates to some of the issues experienced then that can't be coincidence can it? I'm not saying that there isn't a different issue that the TSB fixes as well, but to me the operation of the system must fundamentally be different on models fitted with the sensor - or why bother fitting it?
My MY16 was built Aug 2015 and definitely has the issue compared to my MY10
16th Feb 2017 8:50 pm
markate
Member Since: 17 Sep 2011
Location: England
Posts: 702
LTB 00908 - External Air Temperature reading too high.
LTB 00963 - HVAC
I know of two fixes, one corrected the display showing 3deg high and the other was to stop the heater going cold after an hour or so. The latter was "fixed" by replacing a foam seal.
The heating is still lousy, mainly giving hot driver's feet.
Anyone know of other "fixes"?
Mine is an early MY16.Volvo XC60 - does all that the D4 should have done
Discovery HSE MY16 (good apart from the heating), now sold
Audi TT Roadster (wow)
MGB Roadster (owned since 1992)
Discovery 3 TDV6 HSE MY08
Saab 9-5 Aero 2002 (gone but not forgotten)
16th Feb 2017 9:35 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Lots of threads all over the place for this issue. To me it seems a very simple issue, at least with all the vehicles I have seen. All the vehicles struggling for heat have been over-reading the interior temperature (as displayed on diagnostic equipment). Dealers can see this, IID and Faultmate owners can see this, as can JLR.
I've no idea how this error came about or why JLR are unwilling to fix it, but it is not a difficult fault to understand.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
You would assume they would look at it quickly, but they claim I don't understand how it works and there is no problem. They said they can no longer help me as it works perfectly in their opinion.
Clearly this poll means I am not mad to think something is wrong. But Land Rover CRC prefer to treat their customers as stupid and they don't understand how their car works.
16th Feb 2017 10:06 pm
Oswiperus D3 Decade
Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590
My D4 MY16 went in today, they phoned to say they've done 00908 for the temp display but they have ordered the foam seal for 00963 fix, it should arrive tomorrow and I should have it back tomorrow afternoon.
My heating isn't as bad as some appear to be but I certainly have to turn the temp up to stay comfortable when it's colder outside. I'm not holding my breath as it doesn't appear to have fixed others but we shall see. However if it stays mild I may not be able to tell if it's fixed or not! Also suffers from a bit of misting which my D3 doesn't.
Apart from these issues I'm over the moon with it.Stu
2016 D4 Landmark current
2022 Defender D300 SE Gone
D4 2014 XS Commercial - Gone
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone
D2 1999 TD5 E white - current
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