Hello!
Did they ever work for you? Yes! Worked great for a few years. I have a feeling lightning may be involved.
Have you verified the Omnistat connections at the OmniLTe? Physically, yes, they appear to be connected as they initially were. In fact, I've even switched pairs on the Cat6 cable, which is what I used for these.
Do you have the Dealer PC Access software? I do indeed. The Snaplink app seems to be communicating PCA as I can make changes in the app and see those in PCA.
Do you have an external temp sensor? I do not. I'd love to add one at some point.
My guess is it's gotta be the board but I'm not knowledge enough on circuit board repair or even troubleshooting but I'll happily take any/all advice.
Thanks!