Many,many thanks for all the ideas ,i will get a haines manual and have a little go my self(it could be fun) i will also keep coming back here cos it seems to be the place to find out some great stuff ta very much
 
The heater air intake has a small rubber one way valve that gets blocked.
Its a bastard to get to but you need to clean it and make sure that rain water can get out otherwise it just gets drawn through the heater matrix and appears on your screen as mist.
I managed to get my fingers on on it and squished it a few times while carefully pouring some water through the air intake. Loads of mud and crap came out and now my screen stays clear when demisting.
 
Great replies guy's,It sounds like I will have to do a bit of diy and see if I can sort it, cos as you've probably noticed I live in Caerphilly (that's southeast always wet Wales) so it is odds on to be rain in there somewhere.
Mind you it (the 90) still looks good even if I can't see where i'm going,And I got bull bars so I won't notice if I do hit something.
 
over the years this your landy will have been off roaded and mud & water will have gone through the vent on your wing straight into your heater box and rotted the matrix wich will be leaking slightly.
I picked up a 2nd hand one from a show, at least you can look inside them to see if theres any mud. In the meantime you can bypass it by connecting the 2 heater pipes together I used a piece of bent copper pipe hope this helps
 
M8 i bet your doors are leaking like a siv!! hense the steamy windows lol check behind your door skins to check for signs of leakage :D
 
bugger he beat me to it south wales every time i go over the bridge to visit my family it has got to rain and as most of my famaly live in or around cardiff and bargoed it will always rain as stated my guess would be 1 check the drain plug as quoted and 2 cover the vent for a couple of nights and see if it stops if so its rain in the box if not new matrix
 
LAUNDRY SOFT RINSE / FABRIC SOFTENER IS YOUR MIRACLE GLASS TREATMENT

Landyowner suggested using washup liquid after thoroughly cleaning the inside windows with vinegar.

The vinegar thoroughly degreases the glass, while the washup liquid contains something called a Surfactant, which is a water repellent.

A better source of Sofactant is laundry soft rinse. This contains higher levels of Sofactant, and will leave your Land Rover smelling clean and fresh. Simply polish the inside class with neat (undiluted) laundry soft rinse after following Landyowner's cleaning and decreasing suggestion.

Interestingly, those expensive anti-mist products sold by motor factors are mostly Surfactant based. And, that water-repellent windscreen polish (which clears rain off your windscreen without using your wipers) is also Surfactant based: where the Surfactant's water repellent qualities allow the water to roll off the glass without the need to use windscreen wipers.

WARNING - Do NOT apply water repellent to the outside of a Defender type windscreen! That's because it's the airflow, up and over the curved and sloped windscreen of most cars is what's needed to blow the water off the screen. Wheras that vertical flat windscreen on the Defender doesn't get the necessary air flow. In fact the water will form into large pools (as versus the usual scattering of raindrops) significantly reducing your forward vision even in light rain. Worse, the Sofactant will make your wipers judder, especially in light rain.

DO apply Surfactant to side windows, And especially that glass in the tail door, as it won't just clear the rain from the windows, it'll also make it harder for road dirt to stick to the class, giving better all around vision. It makes the water in road spray work for you. We all know how quickly that rear door glass becomes opaque with road dirt; well polishing with soft rinse will often make it possible to see what's behind you for hundreds of miles of winter motorway driving (as versus the usual total obscuration after just a few miles). In some ways it's better than fitting a wash wipe to the rear door glass, as you'll have to keep washing and swiping a rear wiper every few miles, while although you will still get some build up of road dirt with Sofactant polish, the build up is very gradual, and typically keeps my rear glass see through for several hundred miles before needling a quick wipe over with a sponge and plain water.

By this point you may have realised that something that uses the water in sprayed road dirt to keep glass clean might also work elsewhere on your Landy. Yes, it does! Applying a Sofactant polish to your headlamps will keep them brighter for longer. Also apply to side and tail lights, indicator glass, brake and fog light glass. And, finally, don't forget your door mirrors; it doesn't just repel rain and road dirt, it'll also make snow slip off them and prevent frost and early morning misting, as though you'd fitted heated door mirrors.

Surfactant is amazing stuff! ...as is vinegar or Brasso (used in car showrooms) to pre-clean the inside of your windows.

Have fun and safe driving this winter, especially over the Christmas holidays,
Rick
 
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If coolant isnt being lost you will have to remove the heater box for a look see and as said I bet theres water in it, think theres a drain hole which may be blocked, also helps to leave the bulkhead flaps cracked overnight.
When i recently changed my heater fan/motor the housing had plenty of rust in the bottom
 
M8 i bet your doors are leaking like a siv!! hense the steamy windows lol check behind your door skins to check for signs of leakage :D
I've had a few leaky cars over the years and you always get steamed up on cold mornings have a look in the footwells and around the back door.
The humidity gets very high inside and when it gets cold then condensation forms.
 
Have a look on here for copies (not copies m'lud) you can make for a few quid. Better off with a bit of chamois IMHO.
 
Does the screen steam up when you put the heater onto screen settings? or when it is parked up overnight?

My dad used to used to cut a spud in half and rub the 'juice' onto the screen then wipe with a dry cloth..... he swore by it. But that was 40 years ago, he is 89 so dont shout at him :) But he did have a leaky 1964 mini van!

Any particular brand i.e. Albert Bartlett, King Edward etc, and did he make a battery out the other alf o'tato to power't wireless?
 

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