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Old 11-29-2012, 08:15 PM   #1
Oct 2012
Posts: 11

I think I screwed up...

I bought a Johnson A19ACA-14C on eBay without doing all of the research I should have. Apparently this particular model has to be manually reset each time it opens the circuit. Is there any way to override this feature, or should I just try to sell it and try again? I assume that this model was made as some sort of safety switch for HVAC application...

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Old 11-29-2012, 09:15 PM   #2
501irishred's Avatar
Oct 2012
Benton, Arkansas
Posts: 1,258
Liked 133 Times on 106 Posts

Looks that way. I'm in the HVACR business and have never seen one used, but per specs you are correct. Not sure what application this is typically used for (opens on drop w/ manual reset), but perhaps you can offload it somewhere......

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Old 11-29-2012, 11:50 PM   #3
Feb 2011
North Central, Ohio
Posts: 509
Liked 31 Times on 22 Posts

I agree with 501 - I also do HVACR and have never seen one in the field. It must be used as a last resort safety of some kind.....

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Old 11-30-2012, 12:03 AM   #4
Waste Allocation Load Lifter - Earth Class
passedpawn's Avatar
Apr 2009
☼ Clearwater, FL ☼
Posts: 27,155
Liked 7270 Times on 4315 Posts

I did something similarly dumb when I bought my first controller. I got a A19-xxx that was meant for very hot applications. I took it apart and tried to adjust it down to my fridge temps, but it just wasn't going to please. Lesson learned. Ended up buying the right thing soon after that.
- Andrew

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Old 11-30-2012, 11:55 AM   #5
Aug 2012
Fort Meade
Posts: 813
Liked 47 Times on 43 Posts

It's probably for some 'sanity check' like if the temp gets above this value or below this value there is something f'd up that requires manual intervention.

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