No, BeCM doesn't control the HEVAC, more the other way round, although it does have an internal relay that supplies power to the heated rear window. It isn't involved at all for the heated front screen, the HEVAC pulls in the two relays in the underbonnet fusebox. But it does supply power for the heated seats.

What makes you think that? I did wonder if the BeCM had been swapped for a low line one but having checked, the BeCM doesn't have anything to do with the front or rear screens. It supplies power to the seat heaters but that is all.

You're not the only one. Each of the buttons has an LED behind it so it isn't like the illumination that uses a couple of bulbs and a light pipe. If you've changed the HEVAC and the replacement is the same that would appear to rule that out too. The HEVAC may have some sort of sensing to check that what you have switched on is doing something. Check if relay 5 operates when you switch the heated screen on (when relay 5 operates it powers one side of the screen and also pulls in relay 4 to power the other side). Maybe if it doesn't see a load it won't illuminate the LED. Front and rear screen operation is inhibited if the engine isn't running so maybe the HEVAC isn't seeing the signal to show that. Seat heaters are inhibited if a rear window or the sunroof is either in operation or unset as they use the same power supply and it is to protect the circuit from being overloaded.

Do the other buttons light up, the ones along the bottom that adjust where the airflow goes?

Heated seats rarely work these days, people will insist on sitting on the seats which breaks the elements. How to repair is here http://rrnet.gadsdenrovers.com/repairdetails/seats/seatheat.html. Heated windscreen switch should operate relays 4 and 5 as it is split into left and right sides but where the elements connect at the edges of the screen can come adrift. Usually what happens is it goes in sections, this was mine a couple of years ago when the passenger side was still working but the drivers side had lost a few sections
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Now I'm down to a few strips on the passenger side and none on the drivers.

Rear screen is fed from Fuse 12 via an internal relay in the BeCM. Check to see if you get 12V on one side when it is switched on.

Doesn't really matter, either closed or tilted, although tilted might be easier.

You'll need to take the glass out. Slide the plastic covers on each side (forward if I remember right) so they come off and undo the two Torx screws on each side that hold the glass to the mechanism and lift it out. The seal is there to keep wind noise down, not to stop water getting in, the drains are there to get rid of it once it is there. You'll need to drop the headlining out to get to where they are attached to the sunroof cassette (so you may as well retrim it while it is out.....).

The heated screen button on the HEVAC will be at the top left, above the heated rear screen button. If you've got that button but no heated screen (and probably a gap in the fusebox where relays 4 and 5 would be), then the HEVAC has been replaced with one from a car with screen heater. The larger button, low down on the right is usually marked PROG and is the demist program. If puts the airflow to the screen, the temperature on full heat, the AC on so you get dried air onto the screen, the fans on full and the heated screen (where fitted) and heated rear screen on. One button to poke instead of messing with lots of others.

Inside of the sunroof will get a lot of condensation on it if there is moisture in the car. So if you have a leak somewhere, the moisture that gets in will stay there until the car sits in the sun or gets warm inside when you use it and it will then condense on any cold surface, like the inside of the sunroof or windscreen.

I bought a spares or repair 4.0 SE that needed head gaskets and a few other small bits doing to put it back on the road. Got it running and used it for a bit, loaned it to my daughter for a month when her car packed up in the middle of winter and I didn't feel like spending the time on it in freezing conditions and planned on finishing off a few minor jobs before putting it up for sale. Walked past it one morning and noticed it had developed a crack in the screen, directly in the drivers eyeline. When I had bought it the owner told me the screen had been replaced recently. Took it into a local Autoglass depot and the guy told me the screen had been replaced when he was still 10 feet away from it. He could see immediately it had been done and whoever had done it hadn't put the rubber covers on the steel lugs that stop the screen from sliding downwards so contact with the metal had caused a crack to appear which was slowly working it's way up the screen. Cheapest deal they could offer on a heated screen was £525 and, as it wasn't covered by insurance (trade policy), I sold it as it was with no chance of being able to get an MoT. The guy that bought it intended using it as a donor for one he was restoring but when he saw it couldn't decide which he would use as a donor.

Someone asked the same question recently and apparently there is a single screw in the centre somewhere holding the heater box to the evaporator.

That's very neat. Is it yours? Both mine have the filler where the second electrical socket would live if I had twin electrics. Not immediately obvious and means I can fill up at either side of the pump too.

As long as the Flashlube dosage was set correctly, it wasn't allowed to run out and the LPG system was properly calibrated, it shouldn't suffer VSR. They are quite well known for eating coil packs though, you may be lucky and that, and a set of plugs, is all it will need. A mate has a Jag with the same engine and he's up to over 120k on LPG now with no ill effects.

Had we known I could have gone and had a look at it. But I doubt I'd have spotted an iffy turbo hose as my experience with diesels is very limited so wouldn't know the difference between a good one and one that is about to burst.

Something that your £5k inspection didn't notice along with the bits that don't need doing.....

and the prize goes to dave3d.

As for the birthday, Gordon registered and, presumably put the site up, at 11:06pm on the 29th but the next member to join was Gordon's cat at 12:03am on the 30th. So does it count as a forum when it only has one member?

I copied the link locations from the other side as I couldn't access the pics on your server.

I only replaced mine when it reached the stage of a big clunk when going from forward to reverse.

When we checked it when it was here, it was pressurising when hot, as you would expect, but the pressure went away when it cooled down suggesting it was purely, normal, thermal expansion. That would suggest a leak somewhere.

Lol! Had the opposite when I first got mine. Couldn't work out how to stop the rear wiper at a point where I could replace the wiper blade. Spent ages trying to pull the fuse or relay at just the right moment and failed dismally. Then read the manual.....

Looks like Marty's personal server has died, so I've just edited the post to put them back.