halfast Posted December 7, 2016 Share Posted December 7, 2016 (edited) This isn't a new controller. It worked fine two years ago, the last time it was used. This year, one channel will not turn off. UNLESS, I add a phantom load in the form of a 1W 47 ohm resistor in the circuit. Same light sets work fine on all other circuits on this controller. Only channel 3 has the problem. Does that help any of the hardware gurus out there isolate the problem? Thanks. I think I can live with the snubber on the line but would like to correct the controller if there is a problem in there. Thanks. Merry Christmas. Ron Edited December 7, 2016 by halfast Link to comment Share on other sites More sharing options...
robongar Posted December 7, 2016 Share Posted December 7, 2016 Probably a triac gone Link to comment Share on other sites More sharing options...
k6ccc Posted December 7, 2016 Share Posted December 7, 2016 Since you didn't tell us, I'm assuming an AC controller as opposed to a DC controller. However that statement may not be right based on your snubber. A 47 ohm resistor across 120 volts would draw about 2 1/2 amps, and dissipate over 300 watts - or was that not really 47 ohms? In any case, assuming it's an AC controller, I would think it's most likely a dying triac. Since the snubber is taking care of it (at least for now), I would leave it until after the season and then fix it. Link to comment Share on other sites More sharing options...
halfast Posted December 7, 2016 Author Share Posted December 7, 2016 K6CCC, Robongar, Thanks for the response. I was thinking that the triac might be the culprit. It IS an AC controller. AND, there was a typo on the resistor. It is a 47K ohm resistor...fat fingers. Thanks, guys. Ron Merry Christmas. Link to comment Share on other sites More sharing options...
k6ccc Posted December 7, 2016 Share Posted December 7, 2016 47K makes far more sense! Link to comment Share on other sites More sharing options...
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