Sounds weird, but it looks like there are two T91R fobs, one with 'on & off' & one with 'on & fan/heat' both say T91R....but have totally different label/reference numbers.
I think like you, I still have the 'wrong' one.
Once someone can tell me for definite, I'll start to look around again. 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC
1973 Honda CB250 K4

Try taking the battery out of the fob for 10 minutes, I had trouble with my L405 fob, removed the battery and it paired first time.

PS

If it is the wrong fob I have a L322 fob with on/off, I kept it because I knew my L405 wasn't coming with a fob, just didn't know landrover changed from webasto to eberspacher  Current
2017 Range Rover Sport SVR
2001 Porsche 911 Turbo
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2013 Range Rover Autobiography SDV8
2007 Range Rover Vogue SE TDV8
2002 Range Rover HSE TD6
+ Many other non LR products

Thanks to andygts I now have a working 'fbh' paired up second try & works perfectly.
There definitely seems to be a difference somehow/somewhere between the 'on & off' & the 'off & heat' fob.
My other fob will be on sale on here in a mo if anyone is interested. 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC
1973 Honda CB250 K4

Sorry for the thread resurrection Fox889 so if I read this right you ended up with andygts spare T91 fob and that worked? or you took the battery out of your T91R (on and Fan/heat) fob and that worked?

Would you mind clarifying

Cheers

Maccaa Current FF Westminster 4.4 V8

Macca:
T91R wouldn't work whatever I did, found a T91 c/o andygts & she synced & fired up straight away.
It's very misleading as the Webasto gismo in the boot clearly says T91R [I think].

Hope this helps. 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC
1973 Honda CB250 K4

Perfect Fox889 thank you.

That makes sense. I will get a T91 remote as my T91R does not work as you say, and yes the "box"in the back does say T91R

Thanks

Maccaa Current FF Westminster 4.4 V8