This has been ongoing problem for me. My car had an alarm installed when I bought it( i will post model ect. later today) but I had put it into vallet mode on accident somehow so my car is silent, no beeping to lock unlock doors, no alarm no anything. It was like this for a couple months then bam suddently one day it was working fine, now 2 weekes later it seems to have gone back into vallet mode again. Questions comments suggestions anything would help. Ill post model of alarm up later today if that helps thanks_

READ THE MANUAL :rolleyes

there should be a button secreted into the install somehow to control the valet mode. call the installer and ask them where they put it, as you may be acidentally triggering it without knowing.

no manual...

the valet switch should be somewhere tucked maybe underneath the driver side dash...well at least that's where i put it, but you do need to press it a few times i think to go off valet mode. I'm able to arm/disarm silently if i choose to on my remote. check underneath there somewhere, i'm sure they have one since i think valet switches are necessary for programming the remotes.

ill check it out and get back to you all

so what happened to mosting your the model? if it's a DEI product all install/user manuals are available for download. there's a specific sequence you usally hafta do to get in/out of valet mode. usually something about turning the key then opening a door then pushing the button etc. unless it's a very very basic alarm it should have come with a valet switch. your installer should have told you where they put it. they also should have given you the USER MANUAL.

without the manual and knowing what you have it makes it a little hard to help you though.