Forum Thread

Recessed magnetic window contact not working

idlebrain 1,521 786 July 13, 2016 at 11:41 AM
I have home security alarm monitoring system with a service provider. My home is pre-wired for security by builder. System is from Honeywell with multiple zones and sensors. In one particular zone, there are two windows, each window having one sensor. Now the issue is, one of the sensor is not working, meaning system considers that this window is always closed. So when armed, if I open this window alarm is not going off. When not armed, its supposed to chime when window is opened, but no chime as well. The second window in the same zone is working fine. Can someone please tell me what could be wrong here, is that something I can fix by myself before I write a hefty check to technician.

Thanks in advance.

Magnetic contact is round (probably quarter size) recessed into sill, where as there is a rectangular piece (I guess magnet) attached at the bottom to the moving part of window.

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#2
I would look at the one that works, and look at the one that doesn't work and compare. Make sure all pieces are there and something isn't missing, You could have a bad sensor or a sensor that might not even be wired. IF you can find a model number of your system or sensor that will be helpful if you need to order parts. If it's a new house or new system it should have a warranty?
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#3
Quote from idlebrain View Post :
I have home security alarm monitoring system with a service provider. My home is pre-wired for security by builder. System is from Honeywell with multiple zones and sensors. In one particular zone, there are two windows, each window having one sensor. Now the issue is, one of the sensor is not working, meaning system considers that this window is always closed. So when armed, if I open this window alarm is not going off. When not armed, its supposed to chime when window is opened, but no chime as well. The second window in the same zone is working fine. Can someone please tell me what could be wrong here, is that something I can fix by myself before I write a hefty check to technician.

Thanks in advance.

Magnetic contact is round (probably quarter size) recessed into sill, where as there is a rectangular piece (I guess magnet) attached at the bottom to the moving part of window.
Most likely the contact is just bad. A number of things can cause this lightning being one of the more common causes but the problems would be more widespread.

There are a lot of other possibilities that include things like: sensor installed with a mismatched and too powerful magnet, it isn't actually on the same zone, it was disconnected in the panel, the wire was damaged by a nail or screw while the house was built and nobody caught it, etc.

Some zones are programmed not to chime or only alarm in certain conditions. Looking at the zone status display is more accurate than chime / alarm. Press * to view zone status.

What is the model of the alarm panel?
How many zones do you have?
It would help if you posted a picture of the inside of the panel and the sensor in question.

Wired alarms can be installed in 3 basic ways, without end of line resistors, with single end of line resistors, and with double end of line resistors (zone doubling). Usually installers are lazy and don't really understand the point of eolr, so they disable them or install them inside the panel. The EOLR configuration of your panel may be important to understand when it comes to fixing this.

Remove the sensor from the window frame by prying at its edges with a putty knife or trying to grab it with your fingernails. Once you can get a hold of it, pull it gently until a small amount of wire comes with it (at least 3", preferably more). Cut 1 of the wires several inches from the sensor, see if the panel shows a fault. If it does replace the sensor if it doesn't resolving this will be more difficult

To replace the sensor first you have to identify its type and the size hole it uses. Vinyl windows often have a bigger hole. Post a pic with it installed and after you've pried it out for advice. The easiest to install would be one of the ones with screw terminals.
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Last edited by jkee July 22, 2016 at 03:20 PM
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#4
Thank you for responding.

I don't think there is anything wrong with programming, mismatch or zoning because it has been working all these years. This was installed around 3 years back and this is first time facing this issue.

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#5
Quote from idlebrain View Post :
Thank you for responding.

I don't think there is anything wrong with programming, mismatch or zoning because it has been working all these years. This was installed around 3 years back and this is first time facing this issue.
That outer ring is removable too. You can replace just the center part or the whole thing,

If you remove the outer ring, most likely you'll have a 3/4" hole that you could put something like this in:
http://www.ebay.com/itm/NEW-HONEY...SwstxU9all
Your existing magnet should be fine.

To replace just the center part most 3/8 recessed contact would probably work.

The main differences between different options are the gap size and the wiring method
(screw terminals or crimp connectors/leads built into the sensor).

See how much wire you can get by pulling pretty gently.as long as get a few inches cut one of the wires to see if the panel registers it. You'd have to bypass the zone until you're ready to replace it so you may want to order a replacement first.
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Last edited by jkee July 13, 2016 at 05:02 PM
#6
I may have some of these. I'll look tomorrow.
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#7
Quote from idlebrain View Post :
Thank you for responding.

I don't think there is anything wrong with programming, mismatch or zoning because it has been working all these years. This was installed around 3 years back and this is first time facing this issue.

Pics attached:

Attachment 4375055

Attachment 4375059

Attachment 4375063
Great pictures and as always jkee is obviously a Master
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