kenmhall1

Several times this summer, my alarm has gone off without being disturbed. The only real caveat is that I live in OK and it has been extremely hot here this summer. I've been setting the alarm, pushing the button twice to turn off the interior motion sensor. I had hoped that was all it would take, but it seems to still go off occasionally.

Has anyone else noticed this behavior, or have any suggestions that might help?

Gonzo911

Living in AZ we are extremely hot as you can imagine. Never had that problem though. Good luck!

dotframe

Nope. Not even in 105 degree temps between super hot track sessions.

Dale Gribble

Subscribed because i've been having that problem more frequently.
Did you install an aftermarket deck?

kenmhall1

Yeah, I was starting to worry about that being the culprit as I didn't seem to have the problem before. But then again, I'd only had the car about a month and a half or so before having the deck installed. I also had a parking brake bypass installed for the video if that's of any consequence?

LordVicious

Are you using a sun shade inside the car? Are you SURE the motion sensor is off? I have to ask because mine does the same thing but I'm pretty sure it's the sun shade moving around.

kenmhall1

It has gone off with and without a sunshade in place. As for the interior motion sensor being off, my understanding is that when you press the key remote arming button twice in rapid succession, you will get a double flash of the parking lights and a beep of the horn indicating the interior sensor is disabled. That is how I always arm my alarm. The horn beep gives me reassurance that the alarm is armed, as the parking lights also flash when disarming (but without the horn).

MiamiC70

Heat index was 106 yesterday in Miami and climbing
never had that issue with or without sun shield in place.

Dale Gribble

There's supposed 2 be a wire that needs to be wired into the deck when an aftermarket deck is put in. Otherwise the alarm sometimes goes a bit nuts. Maybe ask your installed to double check? Problem is i'm not sure which wire it is.

kenmhall1

Hmmmm...wonder what wire that might be?!? The guys I used were where the local dealer sends their aftermarket installs, so I assumed they'd be familiar with any particular p-car "gotchas"...maybe not?!?

washington dc porsche

I've only had the problem with sun-shields in the windshield.

Pac996

Possibly the car interior creaking from heating up? The a/c sets a pretty big temperature difference between parts when dealing with 100+ outside.

Had the wind set off my motion one time I figure. Parked with the windows down a few inches in a secure area and I figure the ir sensor read heatwaves as a body moving or something while I was walking away in front of the car.

I'm more inclined to figure the radio however it manages to do set things off. Possibly the radio might have a timer for powering down thats read by the alarm which thinks its somebody tampering. Maybe read the radio manual to see if there is a configuration to change.

Macster

Never had the car alarm go off from the heat (or cold) and I've parked the car in some pretty hot (and cold) temps.

A few times I've had the alarm go off for no obvious reason and traced the reason to a flying insect (small moth) in the car.

If this is going on this can be hard to determine. I was successful in finally spotting the thing fluttering about and splatting the thing with a baseball cap.

Sincerely,

Macster.

roadsession

do a search on alarm wire headunit replacement

porsche-t

This is the reponse I received from Loren a while back: