Member Since: 14 Oct 2013
Location: 'Sunny' Zomerset
Posts: 9402
Robbie wrote:
The D4 issue is self-heating of the cabin thermistor. Those with relatively short journeys will find the system good and accurate. Those driving for an hour or more will find themselves nudging up the dial to compensate for the increasingly over-reading interior sensor. Eventually you run out of adjustments and it will get cold.
It can be fixed, but apparently not by JLR.
Sounds exactly like what happened yesterday, FBH on when I got in Disco, cabin warm, nice and toasty as I drove up past Bristol, then around Swindon way it started to cool down Iggy/Ieuan
Current LR =
2015 RR Sport Autobiography
&
1992 Land Rover Defender Camper
- Gone but not forgotten:
MY10 D4 GS
MY05 Disco 3 'S'
MY14 FL2 HSE manual in Blue
MY15 Disco 4 HSE Lux in Santorini Black
MY08 Disco 3 SE manual in Buck Blue
1960 Series 2 88" (No idea why I sold it!)
22nd Feb 2018 6:25 pm
stick
Member Since: 13 Jan 2010
Location: hants
Posts: 592
Neither of my d4's havr ever behaved like that, and I do regular six hour journeys in them. I think there must be a fault.....d4 HSE
22nd Feb 2018 6:38 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
Iguana wrote:
You going to try it first?
No, as I don't have the problem. Besides I'm the ideas chap, not the guinea pig.
22nd Feb 2018 6:59 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
stick wrote:
I think there must be a fault.....
But LR said it is working to "design intent" on someone's car, I wonder what the designer was smoking when he designed it. I did 11 hours in the car yesterday and didn't have to do much adjustment at all. If this is prevelant in the last few years then it's not something I'd want to inherit with JLR washing their hand of it. Shame as I have a nice white Landmark ready to buy from my folks in a few years ago, which has this problem.
22nd Feb 2018 7:07 pm
Iguana
Member Since: 14 Oct 2013
Location: 'Sunny' Zomerset
Posts: 9402
Right, going to call them tomorrow and book it in for parking sensor and heating - no idea when they can have it though as fairly solid for the next few weeks - I'll keep you postedIggy/Ieuan
Current LR =
2015 RR Sport Autobiography
&
1992 Land Rover Defender Camper
- Gone but not forgotten:
MY10 D4 GS
MY05 Disco 3 'S'
MY14 FL2 HSE manual in Blue
MY15 Disco 4 HSE Lux in Santorini Black
MY08 Disco 3 SE manual in Buck Blue
1960 Series 2 88" (No idea why I sold it!)
22nd Feb 2018 7:17 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
If i understand Robbie correctly it's lack of airflow around the sensor that lets it heat up due to passing current
When I was involved with the Aircon controls on the Aston Martin DB9 we had an interior sensor with a built in fan to keep the air flowing over the sensor.
I wonder if there is a means of fitting one of these sensors so that they keep the sensor reading rather than heating.1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
22nd Feb 2018 7:34 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
But until LR gets its head out of its ar$e that ain't gonna happen. This is the 3rd D3/D4 my parents have owned since moving from Mercs. As things stand, this will be their last LR. A manufacturer is only as good as the last car an owner has. Being frozen on a drive from Cardiff to Birmingham definitely peewees owners off.
Not that JLR gives a stuff.
22nd Feb 2018 7:45 pm
JackNorris
Member Since: 06 Jul 2012
Location: Beds/Bucks Border
Posts: 1877
I have same issue. I booked it in mid Jan but the earliest they could do was Mid April.
Good job its not too importantMY2023 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
22nd Feb 2018 8:11 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
There was a similar situation on early D3’s which if I remember correctly had a tsb issued to fit a foam sock to the temp sensor behind that grill. Symptoms were similar to as described.
Personally I think it’s a bad place to have the interior sensor, as that area gets warm anyway, from heat produced by the infotainment system, and also the heating system itself.
If I’d designed it, I’d have put it in the roof console away from latent heat sources.
22nd Feb 2018 8:17 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
But that fix worked. The fix for late D4s (same sock and software update) doesn't seem to have.
22nd Feb 2018 8:20 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701
Maybe your socks got a hole in it?
22nd Feb 2018 8:25 pm
philm
Member Since: 02 Oct 2016
Location: Manchester
Posts: 732
DSL wrote:
How about just taking that cover beside the steering wheel off and stuffing around the sensor with tissues or something? Basically it'll then get its heat from the surrounding plastic & tissues rather than air flow.
Wouldn't putting a bit of black tape over the little grill do the same?L633 Defender
Range Rover Velar-gone
Discovery 4 Landmark-gone
Gap IID Tool
22nd Feb 2018 9:12 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
It would but I thought might look a bit naff. Might be an option though.
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