The alarm went off this weekend. no lights just an intermittent horn. It would go on for about 30 seconds then off for about 10 seconds.

Tried opening shutting everything and locking and unlocking everything. Pulled out Fuse 43 which just made it a bit quieter, but made no real difference.

After about half an hour it stopped.

No clues in the manual and have searched threads here but may have missed something to explain.

Any thoughts would be welcome. 2014 5.0 Supercharged Autobiography & 2015 3.0SDV6 HSE Lux Discovery 4
2005 4.2 Supercharged Vogue SE & 2011 3.0SDV6 HSE Discovery 4
2002 4.4 Vogue
2000 4.6 Vogue
2011 Discovery 4 3.0 HSE
2015 Discovery 4 HSE Lux
2010 Freelander 2 TD4 HSE
2009 Freelander 2 TD4.e 2009
1992 Mercedes 300D
1986 Renault 2.1 Turbo D
1976 Morris Marina 1.8

Hi RRBlue,

My thoughts are that it's an FFRR and as such was feeling lonely or unloved
All it needed was some attention to make it quiet - just like any baby

Sorry to be flippant!! Someone clever will be along soon!!

This one may help
http://www.fullfatrr.com/forum/topic26454....nnet+alarm

Thanks. Mucked about with bonnet sensor, various sprays etc and all quiet - so far! 2014 5.0 Supercharged Autobiography & 2015 3.0SDV6 HSE Lux Discovery 4
2005 4.2 Supercharged Vogue SE & 2011 3.0SDV6 HSE Discovery 4
2002 4.4 Vogue
2000 4.6 Vogue
2011 Discovery 4 3.0 HSE
2015 Discovery 4 HSE Lux
2010 Freelander 2 TD4 HSE
2009 Freelander 2 TD4.e 2009
1992 Mercedes 300D
1986 Renault 2.1 Turbo D
1976 Morris Marina 1.8

I had this. Changed the bonnet sensor, seemed OK for a week or so then went off again.

Turned out to be the tilt sensor. Cost £146 fitted at LR Lookers Bishops Stortford. Graham

____
Gone: 10MY L320 RR Sport HSE, Ipanema Sand
Gone: 20MY Jaguar iPace HSE, Silicon Silver
Gone: 17MY RR Evoque SE Tech, Loire Blue
Gone: 08MY Discovery 3 XS, Stornoway Grey
Gone: 07MY FFRR TDV8 Vogue, Stornoway Grey