Member Since: 03 May 2016
Location: Kent
Posts: 1520
I'm in if I get the same fob off when I take it in in May.Gary
-------------------------------------------
Discovery 4 HSE 2016MY
17th Apr 2018 11:25 pm
dgardel
Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025
Armpit wrote:
Well guys - I am absolutely amazed to have received a telephone call from the JLR Executive Office this afternoon following my letter to Dr Speth almost three weeks ago........basically there will be no further investigation on my vehicle as JLR considers it is working to the design intent. Unbelievable as it was due to go into the dealership this Weds, an appointment that was made almost two weeks ago, so in other words they are completely dismissing the issue without any further investigation.
I will have confirmation in writing by Thursday this week - no explanation as to why the car can control things for the first 30 minutes or so of a journey, but after that it cannot !
The next step for me is Autoexpress - those I have PM'd in the past I guess will have no problem joining me with this...........
If anyone else would like to write to Autoexpress, I am happy to provide the letter as a template and the powerpoint that I sent to JLR - I expect that the more that hit their letterbox, the more likely they will pick this up and help us. I will also research Watchdog and again if anyone is interested, then please PM me.
One very disappointed, despondent, but determined Landrover Discovery 4 2016MY £45k car owner !!!
Thanks - Paul
Especially when there are earlier model that work well (eg my MY2011)Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition IID Pro MV License
18th Apr 2018 7:41 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26699
Has anyone thought about swapping the thermistor for one from an earlier vehicle and seeing if it cures the issue?
18th Apr 2018 8:51 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72775
You just did! Good thinking Batman.
Trying without luck to find the part number.
Last edited by DSL on 18th Apr 2018 9:01 am. Edited 1 time in total
18th Apr 2018 8:56 am
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26699
Did you salvage yours Del?
18th Apr 2018 9:00 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72775
No, I didn’t get that far. Another part that went to make coke cans.
Thinking more for my folks’ car, their heating is rubbish on long trips and they’re just getting fobbed off. I was just wondering if it was easy to fit (without pulling the dash apart) and see if we can find a tame tester (Iggy?).
Anyone got a link to the Rooooooskie parts site? I’ve lost the link.
18th Apr 2018 9:08 am
grzesiul
Member Since: 11 May 2008
Location: UK
Posts: 6266
lrparts.ru but i found it is not reliable as shows not complete list of parts
18th Apr 2018 11:06 am
discoteca
Member Since: 08 Mar 2010
Location: Warwickshire
Posts: 1477
As I've said before this issue only seems to significantly impact the facelift models i.e. 15 & 16 model years and the biggest single change to the HEVAC system between pre and post facelift is the inclusion of the humidity and windscreen temperature sensor by the rear view mirror.
This sensor does surprisingly more than you might think, for example the heated front screen timer is now also influenced by this sensor (windscreen temperature) whereas the pre facelift heated front screen was just a straight countdown timer.
The HEVAC was significantly changed in post facelift models to take into account new inputs from this sensor and also for the stop start technology (notice how the interior fan reduces speed and aircon deactivates when in an Eco stop situation)
If I were to start anywhere and I keep meaning to try this but haven't got round to it yet, I would be unplugging the humidity sensor to see what impact it has on the overall system because it's the single biggest change.
18th Apr 2018 1:48 pm
SimSamSeven
Member Since: 08 Dec 2012
Location: Surrey
Posts: 160
The facelift came in in the MY14, are others with My14 affected by this issue too?
18th Apr 2018 3:23 pm
LT
Member Since: 31 Dec 2005
Location: South West
Posts: 23337
I've been lucky, all my 2014 and onwards D4's have been problem free on the heating/cooling front. I do many long journeys of 2-4 hours and no issues.
So I'm assuming that there's a variation in the quality of the sensors. Is that right?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
18th Apr 2018 3:26 pm
mse
Member Since: 27 Jun 2005
Location: Shropshire
Posts: 2702
Whatever they did, it fixed ours for the last day of the cold!Mike
18th Apr 2018 10:50 pm
Armpit
Member Since: 08 Mar 2017
Location: Manchester
Posts: 53
Well guys, here is my written response from JLR today after a month from me writing to Dr Speth:
Dear Mr Armstrong,
Further to our telephone conversation on 16th April 2018, in relation to HVAC on your Land Rover Discovery (AU66 UJD).
As advised the video and concerns relating to the differing temperatures within the cabin was referred to our specialised engineers and please see the response provided
The HVAC unit is deliberately designed to mix the chilled and heated air streams. Foot air is taken from the hot side part of the mixing chamber and face air from the cold part. where the air is sent to both face and foot vents our ideal condition is 12°C of 'stratification'. The face vent temperature should never exceed around 26°C which feels slightly cool and the foot vent temperature should always be above around 30°C which is beginning to feel warm.
In this case, the screen air is taken from the top of the chamber so is cool like the face air. This is normal. The temperature measured on the floor in the foot-well will be somewhat lower than the actual vent temperature. Within the cabin you should expect to feel that the air delivered to feet is warm and that the air in the head/face area is cool. The system is designed to do this because cool air to face is refreshing and pleasant and cold feet are not.
The video supplied shows the external ambient air temperature. The vent temperatures indicated are well within the normal range for that environment. Also, the set temperature of 22°C should be treated as a 'comfort level' intended to feel similar to setting your home thermostat to 22°C. There is no intention to control anything about the system to 22°C. Indeed the cabin will be considerably warmer for a set point of 22°C when it's -10°C outside than it will be for the same set point when it's +35°C outside and will be cooler again if there's strong sunshine.
In this case no further investigation will be required as the vehicle is working to design intent.
A further question was raised in relation to why the vehicle is comfortable for the first 30 minutes of operation however this then changes - the technical team advised that this time lapse would be the vehicle warming up.
I hope this provides the clarification that you have been looking for and if there is anything further I can assist with please do not hesitate to contact me.
Please make your own minds up..........my response to follow !
19th Apr 2018 7:25 pm
Armpit
Member Since: 08 Mar 2017
Location: Manchester
Posts: 53
My response:
Thanks for the JLR response………unfortunately, I find parts of it laughable - 30 minutes for a car to warm up (a car that is fitted with a FBH too) - in this time I have driven from Manchester to Burnley (home to work) which to put into context for you is the same as driving from Birmingham Airport to Coventry and back again !!
I fully accept that the temperature setting is a comfort level, although in this vehicle there is no such thing as comfort (from a temperature perspective) when it comes to a journey of more than 30 minutes. It appears we are at an impasse as the JLR position is the vehicle is working to the design intent…………I assure you that mine and all the other affected vehicles are either not working to the design intent or the design intent parameters are wrong………as we all know this does happen (e.g. the Volkswagen diesels were working to the design intent, but this wasn’t correct as has since been proven).
I cannot understand the JLR reluctance to investigate this thoroughly, with direct involvement from the JLR technical team (i.e. they have hands on the vehicle) as this is a problem affecting many owners who are clearly unhappy.
I would also like a response please to confirm that Dr Speth has seen my original mail with the full supporting information I supplied and I would appreciate this by return as it is now several weeks since that mail.
From our telephone discussion, you are aware that I will now engage with the media in attempt to raise an interest from JLR in finding a solution.
Regards - Paul
19th Apr 2018 7:26 pm
Armpit
Member Since: 08 Mar 2017
Location: Manchester
Posts: 53
Does anybody have any experience of using the motor ombudsman's complaint process - I will ask the JLR customer service advisor tomorrow as it appears that they should have directed me to this service........lets see tomorrow, but any advice would be welcome.
Cheers - Paul
19th Apr 2018 7:46 pm
Armpit
Member Since: 08 Mar 2017
Location: Manchester
Posts: 53
On top of everything else going on at the moment with the climate control and JLR not taking an interest, I have had to have a new windscreen fitted last night due to a large crack from stone damage (I've been waiting for two weeks from Autoglass, but that's another story).
I had requested an OE screen, but due to lead times this was not possible, so I accepted a pattern part and have a Fuyao screen fitted.
It is very early days, but I drove from Lancaster to Manchester last night at 11:00pm, outside temperature was 6 - 8 deg C and the cabin temperature was the best it's ever been since I have owned the car. I had it set at 22 deg C, there were no exaggerated noises coming from the blowers, there was no sudden sharp cabin temperature reduction after 30 minutes or so and I was able to be comfortable for around 1 hr 15 mins !
The humidity sensor is not a separate box to the right of the mirror mounting area on this new screen, it's inside the mirror mount, so out of view (don't know if its a new sensor or the same one) - it looks better without the cheap looking black box stuck to the windscreen and based on one journey, my hopes are really raised at this point.
I will keep you advised over the next week on how things go........for the first time, a little light at the end of the tunnel for me in any case !
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
