I have an 03 civic with an Silencer alarm system (ive never heard of it but the cars from California). When my car gets to hot during the summer or to cold during the winter the alarm gets supper sensitive. When i go to unlock it with my keyless entry it will set the alarm of and the only way to turn it off is to put the alarm into Valet mode. Any idea why it would be doing this?

 

Sounds like a problem with the impact sensor, although it should not prevent you from disarming the alarm with the remote once it has triggered.

A better bet is that there is a cold solder connection on the main circuit board, [processor chip(s)] poor solder connections are effected by extreme temp., [high and low].

FYI, Silencer alarms are made by Magnadyne... http://www.magnadyne.com/ they have been making car alarms for a very long time, [30+ years] you can email them for some possible help. 94