Unfortunately for me I got one that the SSR output wasn't working (as have several other people).since it was the main part of my dyi sous vide controller I did a couple of hours of troubleshooting (figured it was me not connecting or setting it properly.however that was not the case.bad component! Darn!On the good side it came from Revain so I was able to easily replace it with them so no hassles on that side.I had another PID on hand so I was able to confirm that it was the controller quickly (once I finally figured out it was the controller not me. :)