Re: Wireless Motion Sensor goes off when A/C set to higher temps

["Jim" <alarminex@xxxxxxx>]

smsdavis wrote:
> Ok.  I'm going to apologize.  Although I studied engineering many years
> ago, I am NOT interested at all in studying alarm systems and how they
> work and I am a woman.  SO, please bear with me but perhaps one of you
> geniuses could help me with a problem we have.
>
> Each and every time we leave town we turn our A/C up to about 80 or
> possibly higher.  Would have to ask hubby the exact temperature but he
> doesn't wish to cool the house while we're gone.
>
> When we do this after we leave town and usually when we're out of cell
> phone range our alarm system starts going off.  It is ALWAYS the
> wireless motion sensor in our front hall area.
>
> Now, we have a maintenance contract with our provider and they have
> sent several people out none of whom seem to know what they are doing
> in this area and all of whom have their own theories.
>
> The first one said there was a known problem with that motion sensor
> not working properly with our old motherboard.  So he replaced the
> entire motherboard of the unit.
>
> We left town and again had to call and have the system ignored while we
> were gone as the problem started happening again.
>
> Today someone came out and said he suspects it is the sunlight coming
> thorugh the window causing the alarm to go off.  I said if that were
> the case then it should be going off even when we're in town and gone
> during the day.  He said, no the A/C would cool it down and keep it
> from going off.  However, there would stil be a temperature difference
> on the stairs regardless of what the AC is set at.
>
> I asked him if there was a specification from the manufacturer with
> operating temperatures to which he replied "NO".  As an engineer I
> really doubt anyone made an electronic device and did NOT specify
> operating temperatures.
>
> So, I'm trying to figure out WHY this keeps occurring.  Is this unit
> truly BAD?  Is it the sun?  Is there an operating temperature and
> perhaps we need to set the A/C to not go past that limit?
>
> Please, feel free to email me anything that might be helpful to
> smdavis@xxxxxxxxxxxxxxx as I really don't have time to check for
> answers but I really need to have a reliable system.  Paying for
> monitoring when we have to turn off half the sensors in the house is
> ridiculous and I don't have much confidence in the techs they keep
> sending to my house and from what little I've read it seems you guys
> know much more about these sytems than do the techs they keep sending
> out.
>
> Thank you so much for anything you can do to shed some light on this
> problem.


I could probably help you determine what's causing your problem, but I
really don't have time to get back to you.