Member Since: 05 Jan 2016
Location: Surrey
Posts: 130
Heated Windscreen
Hello
Wonder if anyone could tell me if the following is expected.
Fully frozen windscreen. Temperature is about -1 degrees.
I put the heated windscreen on, and the fan on max. (engine cold), and it takes a lot longer than the rear to start defrosting the screen.
When it does finally get going (and while is does clear instantaneously), only the drivers side is clear. Passenger side is still frozen.
Whole process to defrost just the drivers side has take around 10 mins. I do not recall it taking that long in the D3 previously.
I tested the park heating system the other day, and that was fantastic, and cleared the ice in less that 15 mins, although no smoke!! Is that because I have a '62 plate D4? The old D3 made an amazing amount of smoke.
Just wondering if I need to take it down to Land Rover to get the heated screen checked out? I have no idea if the screen has ever been replaced.
TIA
21st Nov 2016 11:59 am
rrhool
Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4400
I believe there are two fuses for the front screen heating. Maybe one has blownRichard
D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.
Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone
21st Nov 2016 12:37 pm
Dudleydisco
Member Since: 20 Jun 2014
Location: York
Posts: 853
Fuses 15 and 18 in the engine bay. Robbie posted a wiring diagram in this thread here: http://www.disco4.com/forum/topic107122.ht...windscreenD4 MY14 XXV - RLD/IID BT
D4 MY13 HSE Lux - RLD/IID BT
P38 RR - Sad parting
110 - Even sadder parting
S3 88" - Still going strong after 23 years of ownership
21st Nov 2016 2:14 pm
scimmiamagia
Member Since: 05 Jan 2016
Location: Surrey
Posts: 130
Thanks. Will investigate.
Are they usually so slow to take effect though?
21st Nov 2016 7:53 pm
geoffsnook
Member Since: 13 Jun 2014
Location: south wales
Posts: 3169
No it should start defrosting within a minuet or so depending on how much ice is on there Discovery 3 se gone
Range rover sport supercharged here:)
21st Nov 2016 7:54 pm
Sloss
Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1691
I'm finding similar problems.
Minus 6 this morning. Both heated screen dash lights on but the front refuses to fire up.
I have a cheap volt meter in one of the cigar lighter outlets and sometimes it shows a severe drop on switching on the front screen, sometimes not so that's not a blown fuse, more like load shedding.
Reasonably new battery and she starts just fine so that's probably not the problem.
Anything to check?Stew,
2010 D4 gone but I really loved it
Went back to Merc - C350 AMG
21st Nov 2016 7:59 pm
sbell
Member Since: 06 Sep 2006
Location: perth
Posts: 54
Noticed the same this morning looked like the front not working but rear was -6 here was working ok previous dayRLD wheel protector fitted
21st Nov 2016 9:00 pm
scimmiamagia
Member Since: 05 Jan 2016
Location: Surrey
Posts: 130
It's not fuses. It needs fixing, so a warranty job.
14th Jan 2017 3:58 pm
scimmiamagia
Member Since: 05 Jan 2016
Location: Surrey
Posts: 130
Ok. So not a warranty job. Tiniest of stone chip, and I mean the tiniest chip, has caused one side of the windscreen heated element to fail.
Does that sound feasible or complete bovine excrement?
If it is possible to cause a failure, that seems to me like a bit of a design flaw.
Every car I have ever had has had a stone chip in the windscreen so it's not as if it is an unusual occurrence.
To design something so fragile and so susceptible to damage doesn't seem likely in a car like this.
25th Jan 2017 8:03 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8097
Most unlikely it's a stone chip, a chip may cause one vertical micro wire to fail but not one side, more like a poor connection, check the actual connections on the screen.
Is the screen a genuine LR/Pilkington?- if not this could be the cause of one side failing and slow defrosting It can when others can't,
It will when others won't,
It goes where others don't.
I've found over the years non OEM replacement screens tend not to last much more than 6-12months before one or both sides fail, hence only accept OEM screens even if I have to pay a small excess. But fortunately with LR Insurance there's no excess for OEM glass
These screens require a heavy current, hence being split into two circuits and require the engine on to work. As a result they tend to work better and faster if you bring the revs up a little to get the alternator to work a little harder rather than just leaving the engine tick over. LRs are a fond memory, apart from the maintenance.
Last edited by MrH on 25th Jan 2017 8:19 pm. Edited 1 time in total
25th Jan 2017 8:15 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72786
And NFU. Nice LR badge on my new screen.
25th Jan 2017 8:18 pm
scimmiamagia
Member Since: 05 Jan 2016
Location: Surrey
Posts: 130
It's an LR screen...
15th Feb 2017 5:40 pm
adam
Member Since: 20 Sep 2005
Location: Home and Happy
Posts: 6917
As per MrH - mine will defrost in about 2 mins max - but only if I increase revs slightly (I mean by a couple of hundred, not revving the nadges of it)
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