Astec 49DV Fault

Just to update on this, I did find the end of loop resistor on the other shock sensor I had forgotten about. I tried measuring the resistance at that junction box but wasn't really getting anything and left it on the long finger.

I got back to it today. I removed the end of line resistor on the shock. I then removed the wires on the panel and connected them to the multimetre. Thinking about it now, I may not have removed the resistor probably as there are three connection points on the shocl sensor. One wire went into the first, the second was attached to a resistor going into the second and the third had the other end of the resistor going in. I just detached the resistor end attached to the wire and connected the wire directly in.

Anyway, the multimeter was giving me a reading of 1503 when closed. I had it set at 2000Ω as I was getting a reading at that. This would jump up by 2 or 3 but roughly stay around that. When open it went to 1842, again moving up by 2 or 3 Ω. I tried it a few times and the readings always stayed the same.

I have been disabling the contact sensor for the past few weeks and haven't had any issues.

Does this rule out the sensor itself as being the problem?

Sorry lads, I never came back to update this post. And now I have another question, I should really update this. As I know myself, these threads are invaluable so it's always good to have a conclusion on them. It was my lack of knowledge that lead me down the wrong tracks here but what you were both saying was right, it was a faulty sensor and I was able to track it down and replace it. It's been 12 months now and have had no further problems with that particular issue. Thanks.