Hi All,

Not sure if this should be in this part of the forum or 'What did you do in your...." part but it is a modification so I placed it here !!!

I know this has been done perhaps 100's of times before but I've just updated (upgraded ?) the HVAC unit in my 2015 Vogues SE to the (Slightly) later HVAC unit to allow the heated seats to work without using the screen.

It was one thing that slightly disappointed me on a 2015 vs the later 2016 model.

After some investigation got the unit from an eBay salvage supplier for £80 which I thought wasn't too bad.

I might be wrong but I think the key thing I learned whilst researching was to get the part number beginning with a G not the D of the original.

Anyway here are some pics of the swap.


Good condition as received from the salvage seller on eBay

Click image to enlarge

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Great stuff. It's something I'd love to do so must keep a look out on eBay for a panel. Thanks for posting
all the info.

I had no idea this changed later and it's something I'll have to seriously consider as I really miss the simple buttons of my previous car. Stabbing at a touch screen is much more difficult than pressing a physical switch.

RutlandBoy wrote:

I might be wrong but I think the key thing I learned whilst researching was to get the part number beginning with a G not the D of the original.

Hi MrWold,

Your first question "

Quote:

Do you know if the final two letters, 'DG' in the case of your new unit, are of any significance?"

I have no idea I'm afraid! - all I know is that my 'old' unit has the same DG on the label - and the part number is exactly the same other than the first letter changing from a D to G on the new unit - Sorry I can't be of more help !

This is my old unit (below) and as you can see the only difference is the first letter, everything else is the same.

Click image to enlarge

The second question is easier - Yes there is a definite difference between the two - the new one has a definite 'switch' feel to it - it moves 'in' when you press it - my old one doesn't - so a seller should be able to tell you that I would think, no switch and it's not suitable

For full disclosure - I scanned my car this morning with my IID scanner and I noticed an error code on the HVAC unit - which was 'invalid switch combination' - no other errors and everything works correctly on the HVAC unit (I tested everything this morning!!) and so I guess it means that the car doesn't recognise the panel correctly - but it has no effect on its operation - It might be possible to change the CCF to eliminate the error but I'm really not that bothered - I will keep an eye on it, I will keep my old unit to swap back just in case.!!

It worked immediately with no programming - just swap and go.

For me look and the convenience is worth it !!

If anyone knows if this is fixable I'd love to know - I might ask GAP to see if its something that can be changed in the CCF but my thinking is that it might not be.

I'm not sure if my unit came from a sport or a range rover perhaps that might explain the error - but the unit number is the same for both so I don't think that's the cause, its just that my car isn't meant to have it (obviously!!)

From my limited research on the net - other unit part numbers might work - but the key thing is the press 'switch' capability - no switch action then definitely won't work !!!

Obviously it your choice and risk but fro me it was worth it - relatively easy to do and for me a good modifcation. L405 4.4 V8 Vogue SE Santorini Black
RRS L390 4.2 S/C Stornoway Grey
Classic Range Rover Overfinch 5.7 - their first prototype - under restoration
Late Range Rover P38
Range Rover 3.9 Classic Softdash
Range Rover Classic Overfinch 5.7 - Sadly gone
Disco 3 - Gone
Disco 2 - Gone
TD5 - Gone

Thanks RutlandBoy as I cross-posted. Very useful.
Answering my own question here but it looks like the 'CC' suffix is always missing the seat button and belongs to the Sport. An HPLA-18A802-CC pictured:



That leaves the 'DC' vs the 'DG'. Anyone know? Chris

2014 FFRR 4.4 SDV8 Autobiography Barolo Black
2012 RRS SDV6 HSE Baltic Blue
and before I saw the light:
2011 Suzuki Grand Vitara SZ5
1998 Ford Mondeo V6 Ghia X
1990 Citroen BX GTi
1973 Triumph GT6

I have another of these seat control HVAC units in very good condition for sale. PM me

Mine is the version you press in the dial (like a button) to activate the seat heating/cooling. 2014 FF Autobiography 5.0 SC
2008 FFRR (sold)
2008 BMW M5

Definitely a worthwhile upgrade. I did mine back in Nov 2020. More info on part numbers in this thread: https://www.fullfatrr.com/forum/topic57475.html Kev

2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey

Hi knwatkins

Quote:

Definitely a worthwhile upgrade. I did mine back in Nov 2020. More info on part numbers in this thread: https://www.fullfatrr.com/forum/topic57475.html

Hi Chris, yeah the code is normal when you replace the panel so don't fret. It doesn't affect anything. In all honesty, I haven't tried to code it out with the IID tool but I've taken the 'if it ain't broke don't fix it' approach. Kev

2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey

I’ve completed this upgrade also (on an MY15) & get the same code when scanning with the iid - although as you say, everything functions ok.

Hi Kev,

That is exactly my approach

Just interested I guess, but good to know

Thanks L405 4.4 V8 Vogue SE Santorini Black
RRS L390 4.2 S/C Stornoway Grey
Classic Range Rover Overfinch 5.7 - their first prototype - under restoration
Late Range Rover P38
Range Rover 3.9 Classic Softdash
Range Rover Classic Overfinch 5.7 - Sadly gone
Disco 3 - Gone
Disco 2 - Gone
TD5 - Gone

I've just picked up a GPLA....DH on a certain auction site so fingers crossed that that suffix is OK. There are several reports on forums across the pond that it works.

Edited 2024 to say it worked fine and still is. Chris

2014 FFRR 4.4 SDV8 Autobiography Barolo Black
2012 RRS SDV6 HSE Baltic Blue
and before I saw the light:
2011 Suzuki Grand Vitara SZ5
1998 Ford Mondeo V6 Ghia X
1990 Citroen BX GTi
1973 Triumph GT6

Last edited by MrWold on 24th May 2024 6:38am. Edited 1 time in total

I am trying to do this modification but only see hpla or cpla for sale? Any idea whether this works?

I have a note on my car spready from when i was looking that HPLA is a different CAN bus speed and will not work. I wouldn't have known that my self so probably found it on the forum somewhere.

CPLA - no idea. Chris

2014 FFRR 4.4 SDV8 Autobiography Barolo Black
2012 RRS SDV6 HSE Baltic Blue
and before I saw the light:
2011 Suzuki Grand Vitara SZ5
1998 Ford Mondeo V6 Ghia X
1990 Citroen BX GTi
1973 Triumph GT6