1

I have an AG-1250E water sensor in the pan of my upstairs AC. It was installed 10 years ago, but recently saved me an overflow. I have an issue though, that when this product trips, it starts turning on and off every 3/4 seconds or so. The end result is that the compressor also turns on and off outside and causes power issues visible in some lights in the house. I am sure this is harmful and not intended. My questions is:

Is this likely a bad sensor, or simply bad wiring by the tech? The county inspector made them come back and add a pan later, so I have a feeling it could have been done improperly at first, but I can't find any reference to someone else having this issue.

Improve this question

3 Answers 3

Reset to default
2

I was correct in thinking it was improper wiring. This device appears to be solid state in nature. There was very clear instructions and even a red flag on the wire noting which side had to go to the thermostat to break the power connection to the control board. In spite of all of this, the original installer did it backwards. Once I flipped it around, it worked perfectly when submerged in water and my Nest thermostat warned me of the broken connection. I am only surprised it worked at all when backwards, flickering or not, but the flickering did allow us to find it much faster.

Improve this answer
0

It's possible that the water level is just on the line where it triggers the sensor, the pump starts, the first bit drawn out lowers the water below the sensor, the pump stops, and some water flows back to trigger the sensor again. The pump should have a check valve to limit backflow, but may not, or the check valve may be stuck.

If you want to fix this yourself, I think you really need to observe it in operation and see exactly how the water level is behaving.

Improve this answer
2
  • I've had it overflow multiple times and emptied it down a couple times. I may just drop it in a water cup to be sure, but I'm 95% sure it will do it at any water level
    – David
    Commented Aug 30 at 17:27
  • Well, it was a thought.
    – keshlam
    Commented Aug 30 at 19:44
0

You should not have overflow multiple times

Your drain is not working properly.

Those drains are notorious for mold growth that restricts the flow.

To remedy I clean the drain once a year.

To do that I close the pipe at the end and fill it up with diluted bleach and let it soak for a while.

Improve this answer
2
  • Yes, I have been working on it. It's a 3 story drain line and has been used for almost 40 years. The clog is very stiff due to having to build up under 3 stories of pressure. I increased flow, but have used vinegar, hot water and a shop vac down below. One note: Be careful with that bleach. I've heard the fumes can cause your metal to corrode. I know with stainless, it's great at reacting with the chromium and making it able to rust. Not sure about other types of steels.
    – David
    Commented Aug 31 at 15:49
  • 1
    @David glad we agree on what the problem is, good luck solving it, thanks for the tip on bleach
    – Traveler
    Commented Aug 31 at 17:13

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.